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⌀ | timestamp
timestamp[us]date 1999-12-11 03:00:00
2025-04-28 00:58:08
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---|---|---|---|---|---|---|---|---|---|---|---|---|
A378301 | a(n) is the number of triangular numbers (A000217) in the interval [n^2, (n + 1)^2]. | [
"2",
"2",
"1",
"2",
"1",
"2",
"2",
"1",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"1",
"2",
"2",
"1",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"1",
"1"
] | [
"nonn"
] | 29 | 0 | 1 | [
"A000217",
"A000290",
"A001110",
"A002024",
"A003056",
"A214856",
"A214857",
"A378301"
] | null | Ctibor O. Zizka, Nov 22 2024 | 2024-12-12T15:16:16 | oeisdata/seq/A378/A378301.seq | e425db71c2c2d9066c1979d89be98a02 |
A378302 | Number of nondegenerate balanced Boolean functions of n variables. | [
"0",
"2",
"2",
"58",
"12618",
"601016690",
"1832624137336299922",
"23951146041928082853307218802404658090",
"5768658823449206338089748357862286887548602533639737369730665340966207267034"
] | [
"nonn",
"easy"
] | 19 | 0 | 2 | [
"A000618",
"A037293",
"A378302"
] | null | Aniruddha Biswas, Nov 22 2024 | 2024-12-12T02:47:37 | oeisdata/seq/A378/A378302.seq | 565ac3b4405c4f29b704869ea1f95460 |
A378303 | Irregular triangular T: (row 1) = (1); (row n+1) = inverse runlength sequence of row n, starting with 1 if r = 3k for some k, and 2 otherwise. See Comments. | [
"1",
"2",
"2",
"2",
"1",
"1",
"2",
"2",
"2",
"1",
"2",
"2",
"1",
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"1",
"2",
"1",
"2",
"2",
"1",
"2",
"1",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"2"
] | [
"nonn",
"tabf"
] | 5 | 1 | 2 | [
"A378282",
"A378303",
"A378304",
"A378305",
"A378306",
"A378307"
] | null | Clark Kimberling, Dec 20 2024 | 2024-12-21T01:05:49 | oeisdata/seq/A378/A378303.seq | 13af813af76c46ef3acd54f6e516b255 |
A378304 | Unique sequence s starting with 1,1,2,2 such that if r(r(r(s))) = s and r(s) != s and r(r(s)) != s, where r(#) denotes the runlength sequence of a sequence #. | [
"1",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"1",
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"1",
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"1",
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"2",
"2",
"1",
"2",
"2",
"1",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"1",
"2",
"1"
] | [
"nonn"
] | 7 | 1 | 3 | [
"A378282",
"A378303",
"A378304",
"A378305",
"A378306",
"A378307"
] | null | Clark Kimberling, Dec 20 2024 | 2024-12-21T02:16:46 | oeisdata/seq/A378/A378304.seq | a74315d6750baaa0c5f31a09b466c368 |
A378305 | Unique sequence s starting with 2,1,2 such that if r(r(r(s))) = s and r(s) != s and r(r(s)) != s, where r(#) denotes the runlength sequence of a sequence #. | [
"2",
"1",
"2",
"2",
"1",
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"2",
"1",
"1",
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"2",
"1",
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"2",
"2",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"2",
"1",
"1"
] | [
"nonn"
] | 8 | 1 | 1 | [
"A378282",
"A378303",
"A378304",
"A378305",
"A378306",
"A378307"
] | null | Clark Kimberling, Dec 20 2024 | 2024-12-21T02:16:28 | oeisdata/seq/A378/A378305.seq | f1106c35beb0d79a193096e38f8f62df |
A378306 | Unique sequence s starting with 2,2 such that if r(r(r(s))) = s and r(s) != s and r(r(s)) != s, where r(#) denotes the runlength sequence of a sequence #. | [
"2",
"2",
"1",
"2",
"2",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
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"1",
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"2",
"1",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"1",
"2",
"1"
] | [
"nonn"
] | 8 | 1 | 1 | [
"A378282",
"A378303",
"A378304",
"A378305",
"A378306",
"A378307"
] | null | Clark Kimberling, Dec 20 2024 | 2024-12-21T02:16:42 | oeisdata/seq/A378/A378306.seq | 374645e10b99fc04c59e6def787f14c7 |
A378307 | a(n) is the number of terms in row n of the array A378303. | [
"1",
"1",
"2",
"4",
"6",
"9",
"14",
"21",
"31",
"48",
"71",
"105",
"159",
"237",
"358",
"538",
"808",
"1212",
"1821",
"2731",
"4098",
"6148",
"9221",
"13829",
"20742",
"31107",
"46672",
"70004",
"104968",
"157463",
"236181",
"354207",
"531340",
"796994",
"1195379",
"1793124",
"2689738",
"4034554",
"6051988",
"9077930"
] | [
"nonn"
] | 8 | 1 | 3 | [
"A378282",
"A378303",
"A378307"
] | null | Clark Kimberling, Dec 21 2024 | 2025-01-11T04:09:48 | oeisdata/seq/A378/A378307.seq | 21251bba8eb1a87115fcc9144de298bc |
A378308 | Array read by antidiagonals: For k >= 3, row k-2 consists of the numbers with no digits 0 in bases 3 to k. | [
"1",
"2",
"1",
"4",
"2",
"1",
"5",
"5",
"2",
"1",
"7",
"7",
"7",
"2",
"1",
"8",
"13",
"13",
"7",
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"13",
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"14",
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"14",
"22",
"22",
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"16",
"23",
"23",
"22",
"23",
"22",
"13",
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"1",
"17",
"25",
"41",
"23",
"43",
"23",
"22",
"13",
"2",
"1",
"22",
"26",
"43",
"43",
"121",
"43",
"23",
"22",
"13",
"2",
"1",
"23",
"41",
"121",
"121",
"122",
"121",
"43",
"23",
"23",
"13",
"2",
"1",
"25",
"43",
"122"
] | [
"nonn",
"tabl",
"base"
] | 13 | 1 | 2 | [
"A270027",
"A378308"
] | null | Robert Israel, Nov 22 2024 | 2025-02-19T12:20:35 | oeisdata/seq/A378/A378308.seq | 2f019bc04ba84ed935e32349fe609e0f |
A378309 | a(n) = A010051(n) + A001222(n). | [
"0",
"2",
"2",
"2",
"2",
"2",
"2",
"3",
"2",
"2",
"2",
"3",
"2",
"2",
"2",
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"2",
"3",
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"2",
"5",
"4",
"2",
"2",
"4",
"2",
"2",
"2",
"4",
"2",
"4"
] | [
"nonn",
"easy"
] | 11 | 1 | 2 | [
"A001222",
"A010051",
"A073093",
"A113903",
"A378309"
] | null | Paolo Xausa, Nov 22 2024 | 2024-11-24T09:38:10 | oeisdata/seq/A378/A378309.seq | 04327fa269dcad33182b9bbb7b429541 |
A378310 | Number of cyclic edge cuts in the n-antiprism graph. | [
"4",
"501",
"27691",
"1000430",
"28660045"
] | [
"nonn",
"more"
] | 12 | 3 | 1 | null | null | Eric W. Weisstein, Nov 22 2024 | 2025-02-18T09:00:19 | oeisdata/seq/A378/A378310.seq | 5858b2d3aff4c9f73162312338cea3d0 |
A378311 | Number of cyclic edge cuts in the n-prism graph. | [
"1",
"3",
"81",
"1779",
"29513",
"410947",
"5093689"
] | [
"nonn",
"more"
] | 20 | 3 | 2 | null | null | Eric W. Weisstein, Nov 22 2024 | 2025-01-25T09:13:18 | oeisdata/seq/A378/A378311.seq | 4eb55b297ef83129fedd032e4cc95ae7 |
A378312 | Number of cyclic edge cuts in the n-Moebius ladder graph. | [
"0",
"2",
"80",
"1778",
"29512",
"410946",
"5093688"
] | [
"nonn",
"more"
] | 16 | 3 | 2 | null | null | Eric W. Weisstein, Nov 22 2024 | 2025-01-24T18:29:45 | oeisdata/seq/A378/A378312.seq | 7fcc1252bd5fd17cda40928257864461 |
A378313 | Numbers m such that such that Sum_{i=1..k} A027750(m,i)^i = m for some k <= A000005(m). | [
"1",
"130",
"135",
"288",
"5083",
"8064",
"10130",
"374057639685",
"3138436947541900183",
"5386775810449231243",
"74220449392444960903",
"153525475816743446263",
"1388286039882808958923",
"8020029492466254993943",
"8756593744534084572523",
"16468366959402667137403"
] | [
"nonn",
"hard"
] | 10 | 1 | 2 | [
"A001248",
"A027750",
"A064510",
"A180851",
"A190940",
"A194269",
"A307137",
"A378313",
"A378314"
] | null | Max Alekseyev, Nov 22 2024 | 2024-11-28T11:16:10 | oeisdata/seq/A378/A378313.seq | f80eaf703f013a6aa580a7b5c66f602a |
A378314 | a(n) = number of subsets of {1, 2, ..., n} that represent the first k divisors of m for some positive integers m and 1 <= k <= A000005(m). | [
"0",
"1",
"2",
"4",
"6",
"12",
"16",
"28",
"36",
"52",
"70",
"118",
"150",
"246",
"318",
"382",
"430",
"670",
"798",
"1278",
"1566",
"1886",
"2270",
"3230",
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"4702",
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"11806",
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"172318",
"246046",
"295198",
"344350",
"405790",
"553246",
"626974",
"774430",
"897310"
] | [
"nonn"
] | 14 | 0 | 3 | [
"A001248",
"A027750",
"A064510",
"A180851",
"A190940",
"A194269",
"A307137",
"A378313",
"A378314"
] | null | Max Alekseyev, Nov 22 2024 | 2024-11-23T09:37:31 | oeisdata/seq/A378/A378314.seq | 469573ef013bb0d9e64982f70a59ddb6 |
A378315 | Odd numbers k such that d(phi(k)) = phi(d(k)), where d=A000005 and phi=A000010. | [
"1",
"15230439315",
"18887708385",
"74989937295",
"78103226565",
"86031400455",
"114958521405",
"179883837315",
"210096608085",
"367588711035",
"418094581905",
"461441147895",
"590648954805",
"649146021615",
"685787041485",
"836850895335",
"874197762165",
"990695282031",
"996070731201",
"1002913997085",
"1016370465201",
"1029306324501",
"1029869788311",
"1039854060045",
"1043905592457"
] | [
"nonn"
] | 17 | 1 | 2 | [
"A000005",
"A000010",
"A033632",
"A078148",
"A378315"
] | null | Max Alekseyev, Jan 09 2025 | 2025-01-14T13:34:21 | oeisdata/seq/A378/A378315.seq | f377c6f5c3c3bee16da7231a160029a7 |
A378316 | a(1) = 1, a(2) = 2. For n > 2, a(n) is the sum of the digits of a(n-2) plus the sum of the same digits occurring in all terms a(i); 1 <= i <= n-2. | [
"1",
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"6",
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"5",
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"83",
"108",
"119",
"109",
"104",
"114",
"73",
"79"
] | [
"nonn",
"base",
"easy"
] | 12 | 1 | 2 | [
"A007953",
"A279818",
"A378316",
"A378359",
"A378360"
] | null | David James Sycamore, Nov 23 2024 | 2024-12-08T17:23:38 | oeisdata/seq/A378/A378316.seq | d41c34dc2d3120eb862270d78ef76ace |
A378317 | Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0^n and T(n,k) = k * Sum_{r=0..n} binomial(n,r) * binomial(2*r+k,n)/(2*r+k) for k > 0. | [
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"12",
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"40",
"92",
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"176",
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"544",
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"84",
"300",
"752",
"1440",
"2128",
"2128",
"0",
"1",
"16",
"112",
"472",
"1400",
"3200",
"5872",
"8544",
"8544",
"0",
"1",
"18",
"144",
"700",
"2400",
"6352",
"13664",
"24336",
"35008",
"35008",
"0"
] | [
"nonn",
"tabl"
] | 14 | 0 | 5 | [
"A000007",
"A025227",
"A266213",
"A333473",
"A378317",
"A378318"
] | null | Seiichi Manyama, Nov 23 2024 | 2024-11-24T08:26:24 | oeisdata/seq/A378/A378317.seq | 6a1f6b72e90e378e0e84073c623fc84f |
A378318 | Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0^n and T(n,k) = k * Sum_{r=0..n} binomial(n,r) * binomial(3*r+k,n)/(3*r+k) for k > 0. | [
"1",
"1",
"0",
"1",
"2",
"0",
"1",
"4",
"6",
"0",
"1",
"6",
"16",
"30",
"0",
"1",
"8",
"30",
"84",
"170",
"0",
"1",
"10",
"48",
"170",
"496",
"1050",
"0",
"1",
"12",
"70",
"296",
"1050",
"3140",
"6846",
"0",
"1",
"14",
"96",
"470",
"1920",
"6846",
"20832",
"46374",
"0",
"1",
"16",
"126",
"700",
"3210",
"12936",
"46374",
"142932",
"323154",
"0",
"1",
"18",
"160",
"994",
"5040",
"22402",
"89712",
"323154",
"1005856",
"2301618",
"0"
] | [
"nonn",
"tabl"
] | 15 | 0 | 5 | [
"A000007",
"A266213",
"A366266",
"A378317",
"A378318",
"A378323",
"A378378"
] | null | Seiichi Manyama, Nov 23 2024 | 2024-11-24T09:26:46 | oeisdata/seq/A378/A378318.seq | c3f86e8c606a6add6481a31b247b4604 |
A378319 | Decimal expansion of sqrt(2)*(sqrt(6) - 1)/5. | [
"4",
"0",
"9",
"9",
"7",
"7",
"6",
"1",
"0",
"5",
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"7",
"3",
"7",
"1",
"1",
"1",
"5",
"7"
] | [
"nonn",
"cons",
"easy"
] | 5 | 0 | 1 | [
"A002193",
"A010464",
"A378319"
] | null | Stefano Spezia, Nov 23 2024 | 2024-11-24T02:48:58 | oeisdata/seq/A378/A378319.seq | 762c6e7e463d47171b5ad2daae24c27c |
A378320 | Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0^n and T(n,k) = k * Sum_{r=0..n} binomial(2*n-2*r+k,r) * binomial(r,n-r)/(2*n-2*r+k) for k > 0. | [
"1",
"1",
"0",
"1",
"1",
"0",
"1",
"2",
"1",
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"1",
"3",
"3",
"2",
"0",
"1",
"4",
"6",
"6",
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"1",
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"10",
"13",
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"45",
"128",
"266",
"432",
"570",
"620",
"555",
"392",
"187",
"0"
] | [
"nonn",
"tabl"
] | 12 | 0 | 8 | [
"A000007",
"A007477",
"A071919",
"A378320",
"A378321"
] | null | Seiichi Manyama, Nov 23 2024 | 2024-11-23T09:27:35 | oeisdata/seq/A378/A378320.seq | 0ca68b1f95b27b327431bfc4b35181ab |
A378321 | Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0^n and T(n,k) = k * Sum_{r=0..n} binomial(3*n-3*r+k,r) * binomial(r,n-r)/(3*n-3*r+k) for k > 0. | [
"1",
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"329",
"672",
"1205",
"1912",
"2673",
"3152",
"2673",
"0"
] | [
"nonn",
"tabl"
] | 12 | 0 | 8 | [
"A000007",
"A019497",
"A071919",
"A378320",
"A378321"
] | null | Seiichi Manyama, Nov 23 2024 | 2024-11-23T09:27:38 | oeisdata/seq/A378/A378321.seq | 524f1140e2eb6149243fb63c826a57a6 |
A378322 | Triangle read by rows: T(n,k) is the number of permutations (x_1, x_2, ..., x_k) such that 1/x_1 + 2/x_2 + ... + k/x_k = k, where x_1, x_2, ... x_k are distinct values between 1 and n. | [
"1",
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"13",
"56",
"244",
"744",
"1329",
"1623",
"746",
"749",
"1",
"1"
] | [
"nonn",
"tabl"
] | 31 | 1 | 9 | null | null | Dan Shimizu, Nov 23 2024 | 2024-12-03T20:08:26 | oeisdata/seq/A378/A378322.seq | e582fa79ac0b98c30a5c27f766298a83 |
A378323 | Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0^n and T(n,k) = k * Sum_{r=0..n} binomial(3r+k,r) * binomial(r,n-r)/(3*r+k) for k > 0. | [
"1",
"1",
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"1",
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"1",
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"4",
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"3",
"9",
"18",
"0",
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"60",
"329",
"1599",
"7066",
"28624",
"105147",
"334964",
"785496",
"0"
] | [
"nonn",
"tabl"
] | 11 | 0 | 8 | [
"A000007",
"A038137",
"A071943",
"A364475",
"A371576",
"A378318",
"A378323"
] | null | Seiichi Manyama, Nov 23 2024 | 2024-11-23T09:27:42 | oeisdata/seq/A378/A378323.seq | 05ebd820c7c067db3a8b50e52e03f6f7 |
A378324 | Number of cyclic edge cuts in the complete graph K_n. | [
"0",
"0",
"0",
"0",
"0",
"10",
"840",
"57428",
"4323760",
"428530774",
"66698370662",
"19304350714396",
"11435576322977378",
"13998454986272457974",
"34730539006860778387488",
"172307954877667746584363616",
"1699711619922134215461075979752",
"33269167602899548362529088074829390"
] | [
"nonn"
] | 12 | 1 | 6 | null | null | Eric W. Weisstein, Nov 23 2024 | 2024-11-29T08:16:06 | oeisdata/seq/A378/A378324.seq | 05bea62b5378324e0c6c1f5e5c9dd156 |
A378325 | G.f. A(x) = Sum_{n>=0} a(n)*x^n, where a(n) = Sum_{k=0..n-1} [x^k] A(x)^k for n >= 1 with a(0) = 1. | [
"1",
"1",
"2",
"7",
"41",
"338",
"3499",
"42969",
"606351",
"9633640",
"169888025",
"3290314970",
"69409429043",
"1584105116525",
"38894316619948",
"1022411500472240",
"28653072049382809",
"852911635849385778",
"26876978490909421289",
"893929164892155754432",
"31296785296935394097351",
"1150551256823546563078988"
] | [
"nonn"
] | 13 | 0 | 3 | [
"A002212",
"A307678",
"A349331",
"A349332",
"A349333",
"A349334",
"A349335",
"A377098",
"A378325",
"A378326"
] | null | Vaclav Kotesovec, Nov 23 2024 | 2024-11-24T06:15:48 | oeisdata/seq/A378/A378325.seq | ec2cc58d0fc32789f66e46a1d5cd4fb6 |
A378326 | a(n) = Sum_{k=0..n} binomial(n-1,k-1) * binomial(n*k,k) / ((n-1)*k+1). | [
"1",
"1",
"3",
"19",
"219",
"3901",
"95838",
"3022909",
"116798643",
"5350403737",
"283728025998",
"17104314563843",
"1155635807408096",
"86513627563199279",
"7109252862969177287",
"636268582522962837475",
"61610670571434193189443",
"6418044336586421956746033",
"715718717341021991299583730"
] | [
"nonn"
] | 11 | 0 | 3 | [
"A002212",
"A307678",
"A349331",
"A349332",
"A349333",
"A349334",
"A349335",
"A377098",
"A378325",
"A378326",
"A378327"
] | null | Vaclav Kotesovec, Nov 23 2024 | 2024-11-23T12:47:18 | oeisdata/seq/A378/A378326.seq | 51d6b53ba56a31d268eb6bd0a6cfd3ed |
A378327 | a(n) = Sum_{k=0..n} binomial(n,k) * binomial(n*k,k) / ((n-1)*k + 1). | [
"1",
"2",
"5",
"25",
"257",
"4361",
"104425",
"3241316",
"123865313",
"5628753361",
"296671566941",
"17798975341467",
"1197924420178381",
"89394126594968755",
"7326377073291002147",
"654215578855903951141",
"63225054646397348577601",
"6575059243843086616460321",
"732138834180570978286488133"
] | [
"nonn"
] | 9 | 0 | 2 | [
"A007317",
"A007556",
"A188687",
"A346646",
"A346647",
"A346648",
"A346649",
"A346650",
"A378326",
"A378327"
] | null | Vaclav Kotesovec, Nov 23 2024 | 2024-11-23T12:46:50 | oeisdata/seq/A378/A378327.seq | f231fcefd4b5a9645f429908d958a98a |
A378328 | Decimal expansion of the base 4 Champernowne constant. | [
"4",
"2",
"6",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
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"3",
"4",
"4",
"9",
"2",
"3",
"1",
"5",
"4",
"4",
"4"
] | [
"nonn",
"cons"
] | 18 | 0 | 1 | [
"A003137",
"A030167",
"A030302",
"A030373",
"A030548",
"A030998",
"A031076",
"A031219",
"A033307",
"A054634",
"A066716",
"A066717",
"A077771",
"A077772",
"A378328",
"A378329",
"A378330",
"A378331",
"A378332",
"A378333",
"A378345",
"A378346",
"A378347",
"A378348",
"A378349",
"A378350"
] | null | Joshua Searle, Nov 23 2024 | 2024-12-20T13:14:40 | oeisdata/seq/A378/A378328.seq | 18c95c2e947743d15c43df91513b9626 |
A378329 | Decimal expansion of the base 5 Champernowne constant. | [
"3",
"1",
"0",
"7",
"3",
"6",
"1",
"1",
"1",
"1",
"1",
"1",
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"6",
"8",
"7",
"8",
"2",
"5",
"1",
"8",
"2",
"1",
"0",
"1"
] | [
"nonn",
"cons"
] | 16 | 0 | 1 | [
"A003137",
"A030167",
"A030302",
"A030373",
"A030548",
"A030998",
"A031076",
"A031219",
"A033307",
"A054634",
"A066716",
"A066717",
"A077771",
"A077772",
"A378328",
"A378329",
"A378330",
"A378331",
"A378332",
"A378333",
"A378345",
"A378346",
"A378347",
"A378348",
"A378349",
"A378350"
] | null | Joshua Searle, Nov 23 2024 | 2024-12-20T13:14:44 | oeisdata/seq/A378/A378329.seq | c949d476f725f4080fd6c5cfc9c07c49 |
A378330 | Decimal expansion of the base 6 Champernowne constant. | [
"2",
"3",
"9",
"8",
"6",
"2",
"6",
"8",
"5",
"8",
"1",
"5",
"0",
"6",
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"5",
"8",
"3",
"4",
"3",
"7",
"7",
"5",
"4",
"8",
"3",
"0",
"5",
"0",
"7",
"8",
"0",
"4"
] | [
"nonn",
"cons"
] | 13 | 0 | 1 | [
"A003137",
"A030167",
"A030302",
"A030373",
"A030548",
"A030998",
"A031076",
"A031219",
"A033307",
"A054634",
"A066716",
"A066717",
"A077771",
"A077772",
"A378328",
"A378329",
"A378330",
"A378331",
"A378332",
"A378333",
"A378345",
"A378346",
"A378347",
"A378348",
"A378349",
"A378350"
] | null | Joshua Searle, Nov 23 2024 | 2024-12-20T13:14:49 | oeisdata/seq/A378/A378330.seq | e02274ef0ac4a7bd6b4279ccad5f7927 |
A378331 | Decimal expansion of the base 7 Champernowne constant. | [
"1",
"9",
"4",
"4",
"3",
"5",
"5",
"3",
"5",
"0",
"8",
"6",
"2",
"4",
"0",
"5",
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"4",
"2",
"2",
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"1",
"2",
"4",
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"5",
"8",
"8",
"5",
"3",
"1",
"2",
"3",
"3",
"6",
"7",
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"8",
"8",
"7",
"3",
"9",
"4",
"0",
"3",
"5",
"6",
"6",
"3",
"9",
"7",
"0",
"8",
"5"
] | [
"nonn",
"cons"
] | 8 | 0 | 2 | [
"A003137",
"A030167",
"A030302",
"A030373",
"A030548",
"A030998",
"A031076",
"A031219",
"A033307",
"A054634",
"A066716",
"A066717",
"A077771",
"A077772",
"A378328",
"A378329",
"A378330",
"A378331",
"A378332",
"A378333",
"A378345",
"A378346",
"A378347",
"A378348",
"A378349",
"A378350"
] | null | Joshua Searle, Nov 25 2024 | 2024-12-12T23:24:35 | oeisdata/seq/A378/A378331.seq | 7d3ce42a8633bf334def5a39419a7cd1 |
A378332 | Decimal expansion of the base 8 Champernowne constant. | [
"1",
"6",
"3",
"2",
"6",
"4",
"8",
"1",
"2",
"1",
"0",
"5",
"2",
"1",
"6",
"7",
"9",
"7",
"3",
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"8",
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"5",
"1",
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"2",
"2",
"4",
"2",
"3",
"7",
"8",
"4",
"3",
"2",
"8",
"5",
"4",
"6",
"2",
"3",
"3",
"3",
"0",
"8",
"1",
"3",
"8",
"0",
"7",
"0",
"0",
"4",
"2",
"8",
"3",
"1",
"9",
"4",
"7",
"5",
"9",
"3",
"8",
"5",
"2",
"3",
"5",
"5",
"7",
"5",
"7",
"1",
"1",
"7",
"6"
] | [
"nonn",
"cons"
] | 7 | 0 | 2 | [
"A003137",
"A030167",
"A030302",
"A030373",
"A030548",
"A030998",
"A031076",
"A031219",
"A033307",
"A054634",
"A066716",
"A066717",
"A077771",
"A077772",
"A378328",
"A378329",
"A378330",
"A378331",
"A378332",
"A378333",
"A378345",
"A378346",
"A378347",
"A378348",
"A378349",
"A378350"
] | null | Joshua Searle, Nov 25 2024 | 2024-12-12T23:24:43 | oeisdata/seq/A378/A378332.seq | 68fb4f0f8d8a7343b8fde3a7ee33ad35 |
A378333 | Decimal expansion of the base 9 Champernowne constant. | [
"1",
"4",
"0",
"6",
"2",
"4",
"9",
"7",
"6",
"1",
"1",
"9",
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"9",
"6",
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"2",
"8",
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"6",
"5",
"7",
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"7",
"5",
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"9",
"1",
"4",
"8",
"7",
"8",
"1",
"8",
"5",
"4",
"9",
"5",
"2",
"4",
"3",
"6",
"4",
"4"
] | [
"nonn",
"cons"
] | 6 | 0 | 2 | [
"A003137",
"A030167",
"A030302",
"A030373",
"A030548",
"A030998",
"A031076",
"A031219",
"A033307",
"A054634",
"A066716",
"A066717",
"A077771",
"A077772",
"A378328",
"A378329",
"A378330",
"A378331",
"A378332",
"A378333",
"A378345",
"A378346",
"A378347",
"A378348",
"A378349",
"A378350"
] | null | Joshua Searle, Nov 25 2024 | 2024-12-12T23:24:52 | oeisdata/seq/A378/A378333.seq | 55d4222faf42dff41cec4a36c482c157 |
A378334 | Number of n-node connected sensed planar maps with an external face, whose internal faces are triangles and which is rooted at a node on the external face. | [
"1",
"3",
"16",
"88",
"537",
"3473",
"23562",
"165859",
"1202919",
"8941118",
"67836666",
"523722889",
"4104244351",
"32583588994",
"261635413752",
"2122002356439",
"17364496928654",
"143230857011191",
"1189928600338968",
"9949848535116510",
"83688384576105358",
"707689149415139246",
"6013842677410501394"
] | [
"nonn"
] | 8 | 3 | 2 | [
"A377785",
"A378334",
"A378335",
"A378339",
"A378340"
] | null | Andrew Howroyd, Nov 23 2024 | 2024-11-25T16:29:23 | oeisdata/seq/A378/A378334.seq | 246ec5136fb580d71af0d15fef94ec37 |
A378335 | Number of n-node connected sensed planar maps with an external face in which all internal faces are triangles. | [
"1",
"2",
"5",
"23",
"114",
"675",
"4357",
"29692",
"209933",
"1531349",
"11439545",
"87202034",
"676101375",
"5319069978",
"42378741675",
"341403125204",
"2777329727768",
"22790623236250",
"188475690185517",
"1569588986566488",
"13153980294670851",
"110870960421707325",
"939397206702263021"
] | [
"nonn"
] | 9 | 3 | 2 | [
"A262586",
"A377785",
"A378334",
"A378335",
"A378336",
"A378337",
"A378338",
"A378339",
"A378340"
] | null | Andrew Howroyd, Nov 23 2024 | 2024-11-25T16:29:17 | oeisdata/seq/A378/A378335.seq | 0e25cef5aeb1d6d21fc1f1a6a990877e |
A378336 | Triangle read by rows: T(n,k) is the number of n node connected sensed planar maps with an external face and k triangular internal faces, n >= 3, 1 <= k <= 2*n - 5. | [
"1",
"0",
"1",
"1",
"0",
"1",
"1",
"2",
"1",
"0",
"0",
"2",
"5",
"5",
"6",
"5",
"0",
"0",
"2",
"8",
"13",
"20",
"21",
"26",
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"0",
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"0",
"44",
"227",
"561",
"1066",
"1682",
"2430",
"3241",
"4074",
"4830",
"5876",
"5661"
] | [
"nonn",
"tabf"
] | 9 | 3 | 8 | [
"A002709",
"A002710",
"A002711",
"A262586",
"A341923",
"A378103",
"A378335",
"A378336",
"A378337",
"A378338",
"A378340"
] | null | Andrew Howroyd, Nov 23 2024 | 2024-11-25T16:34:37 | oeisdata/seq/A378/A378336.seq | 7ed71b0975e50b9ab1c8d7b7efc4596d |
A378337 | Number of connected sensed planar maps with an external face and n internal triangular faces. | [
"1",
"2",
"6",
"32",
"155",
"1043",
"7083",
"51983",
"393064",
"3069809",
"24522342",
"199837021",
"1655355627",
"13907476161",
"118275808160",
"1016657106858",
"8821284816805",
"77181267608093",
"680346219098844",
"6037537131435871",
"53904120217352519",
"483921982054548241",
"4366269495618350828",
"39577142154691122910"
] | [
"nonn"
] | 5 | 1 | 2 | [
"A378335",
"A378336",
"A378337",
"A378338",
"A378341"
] | null | Andrew Howroyd, Nov 23 2024 | 2024-11-25T20:45:33 | oeisdata/seq/A378/A378337.seq | a4d7f4ad5bc0b469e6d3f5fc7fad655c |
A378338 | Number of n edge connected sensed planar maps with an external face in which all internal faces are triangles. | [
"1",
"0",
"1",
"2",
"1",
"4",
"8",
"13",
"29",
"60",
"121",
"275",
"604",
"1332",
"3035",
"6866",
"15623",
"36110",
"83421",
"193114",
"451851",
"1057860",
"2482062",
"5864466",
"13873957",
"32891337",
"78352991",
"186929542",
"446870480",
"1071922233",
"2575310764",
"6198621655",
"14957681872",
"36148936396",
"87506326488",
"212249136940",
"515546059746",
"1254062268245"
] | [
"nonn"
] | 6 | 3 | 4 | [
"A378335",
"A378336",
"A378337",
"A378338",
"A378342",
"A378343"
] | null | Andrew Howroyd, Nov 23 2024 | 2024-11-25T20:44:43 | oeisdata/seq/A378/A378338.seq | d0a15eea5755fda999474a07edc1bbfd |
A378339 | Number of n-node connected achiral planar maps with an external face in which all internal faces are triangles. | [
"1",
"2",
"5",
"15",
"46",
"139",
"449",
"1448",
"4799",
"15971",
"54107",
"184048",
"633365",
"2188644",
"7624153",
"26659774",
"93772014",
"330946542",
"1173233805",
"4171572088",
"14884905583",
"53249784377",
"191043396323",
"686956509123",
"2476044740337",
"8942288625630",
"32360306616473",
"117309644377341"
] | [
"nonn"
] | 7 | 3 | 2 | [
"A377785",
"A378335",
"A378339",
"A378340",
"A378341",
"A378342"
] | null | Andrew Howroyd, Nov 24 2024 | 2024-11-25T16:29:13 | oeisdata/seq/A378/A378339.seq | 2703281d6f62a6d409883c064c646bd6 |
A378340 | Triangle read by rows: T(n,k) is the number of n node connected achiral planar maps with an external face and k triangular internal faces, n >= 3, 1 <= k <= 2*n - 5. | [
"1",
"0",
"1",
"1",
"0",
"1",
"1",
"2",
"1",
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"3",
"4",
"3",
"0",
"0",
"2",
"4",
"7",
"8",
"7",
"10",
"8",
"0",
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"4",
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"15",
"19",
"22",
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"266",
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"0",
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"7",
"26",
"64",
"123",
"186",
"288",
"346",
"488",
"556",
"634",
"557",
"844",
"680"
] | [
"nonn",
"tabf"
] | 15 | 3 | 8 | [
"A002712",
"A378103",
"A378336",
"A378339",
"A378340",
"A378341",
"A378342"
] | null | Andrew Howroyd, Nov 25 2024 | 2024-12-16T14:42:52 | oeisdata/seq/A378/A378340.seq | 0d0b773ef49ec0c7ee32eeb4c624373d |
A378341 | Number of connected achiral planar maps with an external face and n internal triangular faces. | [
"1",
"2",
"6",
"16",
"45",
"129",
"367",
"1081",
"3098",
"9291",
"26788",
"81341",
"235729",
"722479",
"2102856",
"6492146",
"18965527",
"58898531",
"172600126",
"538640825",
"1582733185",
"4959648919",
"14607576158",
"45935431662",
"135571479679",
"427621459608",
"1264356405112",
"3998682343629",
"11842126315245",
"37540318975749"
] | [
"nonn"
] | 5 | 1 | 2 | [
"A378337",
"A378339",
"A378340",
"A378341",
"A378342"
] | null | Andrew Howroyd, Nov 25 2024 | 2024-11-25T20:45:28 | oeisdata/seq/A378/A378341.seq | abec70bad6a17fe1ca868fed7be37ce7 |
A378342 | Number of n edge connected achiral planar maps with an external face in which all internal faces are triangles. | [
"1",
"0",
"1",
"2",
"1",
"4",
"6",
"7",
"15",
"22",
"33",
"59",
"94",
"140",
"249",
"388",
"617",
"1040",
"1675",
"2628",
"4481",
"7108",
"11494",
"19030",
"30885",
"49315",
"82559",
"132406",
"215326",
"353923",
"576552",
"928437",
"1539504",
"2485102",
"4051828",
"6636368",
"10830526",
"17524893",
"28903185",
"46838466",
"76464837",
"125019717"
] | [
"nonn"
] | 6 | 3 | 4 | [
"A378338",
"A378339",
"A378340",
"A378341",
"A378342",
"A378343"
] | null | Andrew Howroyd, Nov 25 2024 | 2024-11-25T20:44:52 | oeisdata/seq/A378/A378342.seq | 82ed893307052d0fb84be90a0b0fe40a |
A378343 | Number of n edge connected unsensed planar maps with an external face in which all internal faces are triangles. | [
"1",
"0",
"1",
"2",
"1",
"4",
"7",
"10",
"22",
"41",
"77",
"167",
"349",
"736",
"1642",
"3627",
"8120",
"18575",
"42548",
"97871",
"228166",
"532484",
"1246778",
"2941748",
"6952421",
"16470326",
"39217775",
"93530974",
"223542903",
"536138078",
"1287943658",
"3099775046",
"7479610688",
"18075710749",
"43755189158",
"106127886654",
"257778445136"
] | [
"nonn"
] | 6 | 3 | 4 | [
"A377785",
"A378103",
"A378338",
"A378342",
"A378343"
] | null | Andrew Howroyd, Nov 25 2024 | 2024-11-25T20:44:56 | oeisdata/seq/A378/A378343.seq | 92c2d44f8a08b7abc4c6c216233fc89e |
A378344 | Number of fixed site animals with n nodes on the nodes of the prismatic pentagonal tiling. | [
"3",
"5",
"12",
"35",
"106",
"332",
"1062",
"3466",
"11496",
"38621",
"131042",
"448146",
"1542548",
"5338641",
"18563680",
"64814950",
"227117365",
"798387748",
"2814618634"
] | [
"nonn",
"hard",
"more"
] | 19 | 1 | 1 | [
"A001168",
"A001207",
"A001420",
"A196991",
"A196992",
"A196993",
"A197158",
"A197160",
"A197461",
"A197464",
"A197467",
"A378344"
] | null | Johann Peters, Nov 23 2024 | 2025-01-03T23:28:30 | oeisdata/seq/A378/A378344.seq | ec12cc43d2a95150087cf7cd5687a69b |
A378345 | Continued fraction expansion of the base 4 Champernowne constant. | [
"0",
"2",
"2",
"1",
"7",
"1",
"1",
"2",
"1",
"1",
"1",
"1",
"6806293849",
"1",
"33",
"157",
"1",
"2",
"1",
"3",
"1",
"1",
"2345427263108642344323518197756649380964709224412095403124301722165",
"2",
"2",
"1",
"1",
"1",
"3",
"1",
"1",
"6",
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"1",
"126",
"3",
"13",
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"13",
"4",
"33",
"3",
"1",
"1",
"1",
"3",
"2",
"4",
"1",
"9",
"2"
] | [
"nonn",
"cofr"
] | 9 | 0 | 2 | [
"A030167",
"A030373",
"A066717",
"A077772",
"A378328",
"A378345",
"A378346",
"A378347",
"A378348",
"A378349",
"A378350"
] | null | Joshua Searle, Dec 13 2024 | 2024-12-14T03:45:44 | oeisdata/seq/A378/A378345.seq | 6bafbda6dc76f70bfbffb97a79873988 |
A378346 | Continued fraction expansion of the base 5 Champernowne constant. | [
"0",
"3",
"4",
"1",
"1",
"2",
"2",
"18",
"1",
"20",
"1302701925685142513155",
"3",
"5",
"6",
"1",
"1",
"1",
"1",
"1",
"1",
"2",
"13",
"5",
"2",
"1",
"22",
"1",
"1"
] | [
"nonn",
"cofr"
] | 11 | 0 | 2 | [
"A030167",
"A031219",
"A066717",
"A077772",
"A378329",
"A378345",
"A378346",
"A378347",
"A378348",
"A378349",
"A378350"
] | null | Joshua Searle, Dec 13 2024 | 2024-12-13T21:46:39 | oeisdata/seq/A378/A378346.seq | a66c6127d1c529d822c5e3283b22264e |
A378347 | Continued fraction expansion of the base 6 Champernowne constant. | [
"0",
"4",
"5",
"1",
"10",
"1",
"4",
"3",
"9",
"1",
"2",
"2",
"1",
"1",
"699745284439054751106354294914368414245",
"2",
"5",
"1",
"20",
"22",
"2",
"2",
"1",
"10",
"3",
"1",
"2",
"2",
"2",
"1",
"1",
"2",
"1",
"1"
] | [
"nonn",
"cofr"
] | 11 | 0 | 2 | [
"A030167",
"A030548",
"A066717",
"A077772",
"A378330",
"A378345",
"A378346",
"A378347",
"A378348",
"A378349",
"A378350"
] | null | Joshua Searle, Dec 13 2024 | 2024-12-14T03:45:11 | oeisdata/seq/A378/A378347.seq | 9934c1f6c2ec964ee3c076ec9fe0cfb0 |
A378348 | Continued fraction expansion of the base 7 Champernowne constant. | [
"0",
"5",
"6",
"1",
"85",
"1",
"2",
"1",
"11",
"1",
"3",
"2",
"1",
"5",
"1",
"2",
"8697444597678755989498288581049684565698396369776180853037564",
"1",
"4",
"2",
"8",
"6",
"1",
"2",
"11",
"1",
"11",
"1",
"9",
"2",
"11",
"1",
"13",
"2",
"3",
"10"
] | [
"nonn",
"cofr"
] | 9 | 0 | 2 | [
"A030167",
"A030998",
"A066717",
"A077772",
"A378331",
"A378345",
"A378346",
"A378347",
"A378348",
"A378349",
"A378350"
] | null | Joshua Searle, Dec 14 2024 | 2024-12-14T20:32:30 | oeisdata/seq/A378/A378348.seq | 2ae99122d05d51aeabcd4db669af69b6 |
A378349 | Continued fraction expansion of the base 8 Champernowne constant. | [
"0",
"6",
"7",
"1",
"842",
"5",
"11",
"2",
"1",
"4",
"1",
"12",
"1217611913245203113561611289624720261608646275831638269345353220034950193075766082779756144",
"39",
"1",
"13",
"19",
"1",
"1",
"2",
"1",
"6",
"1",
"4",
"9",
"1",
"2",
"1",
"3",
"2",
"1",
"223",
"2",
"1"
] | [
"nonn",
"cofr"
] | 7 | 0 | 2 | [
"A030167",
"A054634",
"A066717",
"A077772",
"A378332",
"A378345",
"A378346",
"A378347",
"A378348",
"A378349",
"A378350"
] | null | Joshua Searle, Dec 14 2024 | 2024-12-14T20:37:42 | oeisdata/seq/A378/A378349.seq | cf6b5c507b9d9a27454bbb28e7b38a55 |
A378350 | Continued fraction expansion of the base 9 Champernowne constant. | [
"0",
"7",
"8",
"1",
"10222",
"1",
"1",
"1",
"1",
"1",
"12",
"1",
"1",
"1",
"145",
"1",
"13127841267973253934598674824559230051317913195904874825561053745645554655306632773083671838234108227370808367172269493508107",
"1",
"7",
"3",
"1",
"1",
"1",
"2",
"2",
"15",
"3",
"2",
"1",
"3",
"2",
"1",
"1",
"7",
"4",
"1",
"4",
"1",
"1",
"3",
"3",
"1",
"1"
] | [
"nonn",
"cofr"
] | 5 | 0 | 2 | [
"A030167",
"A031076",
"A066717",
"A077772",
"A378333",
"A378345",
"A378346",
"A378347",
"A378348",
"A378349",
"A378350"
] | null | Joshua Searle, Dec 14 2024 | 2024-12-14T17:45:10 | oeisdata/seq/A378/A378350.seq | 5d7e6c0c96638f7c9b26d5bb2b130603 |
A378351 | Decimal expansion of the surface area of a (small) triakis octahedron with unit shorter edge length. | [
"1",
"0",
"6",
"7",
"2",
"9",
"4",
"1",
"8",
"7",
"3",
"9",
"8",
"3",
"5",
"4",
"6",
"7",
"0",
"5",
"1",
"5",
"0",
"0",
"0",
"8",
"9",
"2",
"2",
"4",
"9",
"0",
"1",
"6",
"0",
"5",
"6",
"4",
"5",
"9",
"0",
"1",
"0",
"4",
"2",
"3",
"7",
"7",
"1",
"5",
"4",
"7",
"1",
"2",
"6",
"4",
"4",
"7",
"5",
"3",
"7",
"1",
"0",
"6",
"3",
"0",
"4",
"9",
"1",
"0",
"1",
"2",
"1",
"2",
"7",
"2",
"8",
"6",
"0",
"3",
"3",
"8",
"6",
"3",
"8",
"8",
"2",
"1",
"1",
"8"
] | [
"nonn",
"cons",
"easy"
] | 5 | 2 | 3 | [
"A010487",
"A201488",
"A377298",
"A378351",
"A378352",
"A378353",
"A378354"
] | null | Paolo Xausa, Nov 23 2024 | 2024-11-28T11:10:54 | oeisdata/seq/A378/A378351.seq | 3edbec9213754c46e606e9e1ee1f8f87 |
A378352 | Decimal expansion of the volume of a (small) triakis octahedron with unit shorter edge length. | [
"2",
"9",
"1",
"4",
"2",
"1",
"3",
"5",
"6",
"2",
"3",
"7",
"3",
"0",
"9",
"5",
"0",
"4",
"8",
"8",
"0",
"1",
"6",
"8",
"8",
"7",
"2",
"4",
"2",
"0",
"9",
"6",
"9",
"8",
"0",
"7",
"8",
"5",
"6",
"9",
"6",
"7",
"1",
"8",
"7",
"5",
"3",
"7",
"6",
"9",
"4",
"8",
"0",
"7",
"3",
"1",
"7",
"6",
"6",
"7",
"9",
"7",
"3",
"7",
"9",
"9",
"0",
"7",
"3",
"2",
"4",
"7",
"8",
"4",
"6",
"2",
"1",
"0",
"7",
"0",
"3",
"8",
"8",
"5",
"0",
"3",
"8",
"7",
"5",
"3"
] | [
"nonn",
"cons",
"easy"
] | 8 | 1 | 1 | [
"A002193",
"A156035",
"A188582",
"A201488",
"A377299",
"A378351",
"A378352",
"A378353",
"A378354"
] | null | Paolo Xausa, Nov 23 2024 | 2024-12-02T06:09:40 | oeisdata/seq/A378/A378352.seq | 956e06faad3b8bd78e401dd242f923e9 |
A378353 | Decimal expansion of the inradius of a (small) triakis octahedron with unit shorter edge length. | [
"8",
"1",
"9",
"1",
"4",
"0",
"6",
"6",
"3",
"4",
"0",
"3",
"2",
"5",
"7",
"1",
"6",
"1",
"7",
"1",
"5",
"4",
"9",
"1",
"3",
"4",
"5",
"7",
"3",
"5",
"6",
"5",
"3",
"1",
"6",
"6",
"2",
"4",
"1",
"5",
"5",
"5",
"2",
"0",
"3",
"0",
"6",
"1",
"3",
"2",
"0",
"1",
"6",
"6",
"7",
"6",
"5",
"3",
"7",
"8",
"7",
"9",
"1",
"4",
"2",
"4",
"2",
"6",
"4",
"3",
"4",
"6",
"2",
"0",
"6",
"6",
"0",
"7",
"8",
"1",
"0",
"8",
"8",
"3",
"4",
"9",
"9",
"7",
"1",
"3"
] | [
"nonn",
"cons",
"easy"
] | 4 | 0 | 1 | [
"A010487",
"A201488",
"A378351",
"A378352",
"A378353",
"A378354"
] | null | Paolo Xausa, Nov 23 2024 | 2024-11-28T11:11:10 | oeisdata/seq/A378/A378353.seq | f7afc51e988487a9616b8604f37ee850 |
A378354 | Decimal expansion of the dihedral angle, in radians, between any two adjacent faces in a (small) triakis octahedron. | [
"2",
"5",
"7",
"1",
"7",
"4",
"4",
"4",
"0",
"0",
"3",
"4",
"5",
"6",
"6",
"8",
"4",
"6",
"7",
"9",
"1",
"2",
"8",
"5",
"4",
"0",
"5",
"0",
"9",
"2",
"8",
"0",
"6",
"3",
"7",
"9",
"3",
"5",
"5",
"1",
"1",
"5",
"6",
"9",
"4",
"1",
"1",
"1",
"3",
"8",
"5",
"9",
"7",
"4",
"5",
"3",
"2",
"5",
"4",
"4",
"5",
"4",
"2",
"6",
"8",
"0",
"3",
"6",
"3",
"5",
"1",
"6",
"5",
"6",
"1",
"5",
"2",
"6",
"3",
"5",
"8",
"7",
"9",
"1",
"4",
"6",
"0",
"6",
"6",
"5"
] | [
"nonn",
"cons",
"easy"
] | 7 | 1 | 1 | [
"A019669",
"A195698",
"A201488",
"A377342",
"A378351",
"A378352",
"A378353",
"A378354"
] | null | Paolo Xausa, Nov 24 2024 | 2024-11-28T11:11:19 | oeisdata/seq/A378/A378354.seq | 792069327ecdb5c484bb1f4244d27a19 |
A378355 | Numbers appearing exactly once in A378035 (greatest perfect power < prime(n)). | [
"125",
"216",
"243",
"64000",
"1295029",
"2535525316",
"542939080312"
] | [
"nonn",
"more"
] | 11 | 1 | 1 | [
"A000040",
"A000961",
"A001223",
"A001597",
"A007916",
"A031218",
"A045542",
"A052410",
"A053289",
"A067871",
"A069623",
"A076411",
"A076412",
"A080769",
"A081676",
"A131605",
"A178700",
"A188951",
"A216765",
"A375706",
"A377283",
"A377432",
"A377434",
"A377436",
"A377466",
"A377468",
"A378035",
"A378249",
"A378250",
"A378251",
"A378253",
"A378355",
"A378356",
"A378374",
"A379154"
] | null | Gus Wiseman, Nov 26 2024 | 2025-02-07T21:32:17 | oeisdata/seq/A378/A378355.seq | ea35e5d15e9887447283a6eae3337ba7 |
A378356 | Prime index of the next prime after the n-th perfect power. | [
"1",
"3",
"5",
"5",
"7",
"10",
"10",
"12",
"12",
"16",
"19",
"23",
"26",
"31",
"31",
"32",
"35",
"40",
"45",
"48",
"49",
"54",
"55",
"62",
"67",
"69",
"73",
"79",
"86",
"93",
"98",
"100",
"106",
"115",
"123",
"130",
"138",
"147",
"155",
"163",
"169",
"173",
"182",
"192",
"201",
"211",
"218",
"220",
"229",
"241",
"252",
"264",
"270",
"275",
"284",
"296",
"307",
"310",
"320"
] | [
"nonn"
] | 9 | 1 | 2 | [
"A000040",
"A000961",
"A001223",
"A001597",
"A007916",
"A045542",
"A052410",
"A053289",
"A057820",
"A065514",
"A068361",
"A069623",
"A076411",
"A076412",
"A080769",
"A081676",
"A216765",
"A345531",
"A375706",
"A377283",
"A377432",
"A377434",
"A377436",
"A377466",
"A377468",
"A378035",
"A378249",
"A378250",
"A378251",
"A378253",
"A378356",
"A378365"
] | null | Gus Wiseman, Dec 05 2024 | 2024-12-05T19:35:33 | oeisdata/seq/A378/A378356.seq | 27e453ddc0c47b0f8b0a70cb2f9dce27 |
A378357 | Distance from n to the least non perfect power >= n. | [
"1",
"0",
"0",
"1",
"0",
"0",
"0",
"2",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0"
] | [
"nonn"
] | 14 | 1 | 8 | [
"A000015",
"A000961",
"A001597",
"A007916",
"A007918",
"A007920",
"A013597",
"A013603",
"A013632",
"A031218",
"A045542",
"A052410",
"A053289",
"A057820",
"A067535",
"A069623",
"A074984",
"A076411",
"A081221",
"A081676",
"A113646",
"A120327",
"A131605",
"A159477",
"A188951",
"A216765",
"A375702",
"A375706",
"A375736",
"A376559",
"A376562",
"A377432",
"A377436",
"A377468",
"A378357",
"A378358",
"A378363",
"A378364",
"A378369",
"A378370",
"A378371",
"A378372",
"A378456"
] | null | Gus Wiseman, Nov 24 2024 | 2024-11-27T18:57:59 | oeisdata/seq/A378/A378357.seq | 59c11163a4649e34cc93e9abdf014b70 |
A378358 | Least non-perfect-power >= n. | [
"2",
"2",
"3",
"5",
"5",
"6",
"7",
"10",
"10",
"10",
"11",
"12",
"13",
"14",
"15",
"17",
"17",
"18",
"19",
"20",
"21",
"22",
"23",
"24",
"26",
"26",
"28",
"28",
"29",
"30",
"31",
"33",
"33",
"34",
"35",
"37",
"37",
"38",
"39",
"40",
"41",
"42",
"43",
"44",
"45",
"46",
"47",
"48",
"50",
"50",
"51",
"52",
"53",
"54",
"55",
"56",
"57",
"58",
"59",
"60",
"61",
"62",
"63",
"65",
"65",
"66",
"67"
] | [
"nonn",
"changed"
] | 24 | 1 | 1 | [
"A000015",
"A000040",
"A000961",
"A001223",
"A001597",
"A007916",
"A007918",
"A014210",
"A031218",
"A045542",
"A052410",
"A053289",
"A057820",
"A065514",
"A067535",
"A069623",
"A070321",
"A076411",
"A076412",
"A081676",
"A113646",
"A120327",
"A131605",
"A159477",
"A188951",
"A216765",
"A345531",
"A375703",
"A375706",
"A375738",
"A377432",
"A377436",
"A377468",
"A378033",
"A378357",
"A378358",
"A378363",
"A378369",
"A378372"
] | null | Gus Wiseman, Nov 24 2024 | 2025-04-25T21:10:16 | oeisdata/seq/A378/A378358.seq | cbe77ed8235d176507499093edf83ae2 |
A378359 | a(1) = 0, a(n) = Sum_{digits d in a(n-1)} c(d,n-1), where c(d,k) is the number of digits d in a(1..k). | [
"0",
"1",
"1",
"2",
"1",
"3",
"1",
"4",
"1",
"5",
"1",
"6",
"1",
"7",
"1",
"8",
"1",
"9",
"1",
"10",
"13",
"14",
"15",
"16",
"17",
"18",
"19",
"20",
"5",
"3",
"3",
"4",
"3",
"5",
"4",
"4",
"5",
"5",
"6",
"3",
"6",
"4",
"6",
"5",
"7",
"3",
"7",
"4",
"7",
"5",
"8",
"3",
"8",
"4",
"8",
"5",
"9",
"3",
"9",
"4",
"9",
"5",
"10",
"23",
"13",
"31",
"33",
"14",
"32",
"19",
"29",
"12",
"30",
"21",
"32",
"25",
"20",
"16",
"32"
] | [
"nonn",
"base",
"easy"
] | 16 | 1 | 4 | [
"A279818",
"A378359"
] | null | Michael De Vlieger and David James Sycamore, Nov 24 2024 | 2024-11-27T18:35:52 | oeisdata/seq/A378/A378359.seq | ccb789db86143af1080adc4936eb3e8a |
A378360 | a(1) = 0, a(n) = Sum_{digits d in a(n-1)} (d+[d==0])*c(d,n-1) where c(d,k) = number of digits d in a(1..a(k)), with Iverson bracket. | [
"0",
"1",
"1",
"2",
"2",
"4",
"4",
"8",
"8",
"16",
"9",
"9",
"18",
"28",
"38",
"43",
"18",
"53",
"14",
"22",
"10",
"9",
"27",
"19",
"44",
"24",
"42",
"48",
"92",
"63",
"24",
"60",
"21",
"31",
"25",
"34",
"62",
"50",
"19",
"65",
"50",
"30",
"27",
"42",
"78",
"85",
"102",
"51",
"48",
"132",
"72",
"64",
"92",
"101",
"24",
"100",
"27",
"77",
"49",
"136",
"87",
"144",
"91",
"101",
"33",
"33",
"39"
] | [
"nonn",
"easy"
] | 12 | 1 | 4 | [
"A279818",
"A378316",
"A378359",
"A378360"
] | null | Michael De Vlieger and David James Sycamore, Nov 26 2024 | 2024-11-27T18:36:07 | oeisdata/seq/A378/A378360.seq | ed098812d0d48dbdeb2c34fe9cc3ab57 |
A378361 | Octagonal indices of numbers that are both octagonal and octagonal pyramidal. | [
"0",
"1",
"19",
"45",
"6413415",
"16068720"
] | [
"nonn",
"fini",
"full"
] | 8 | 1 | 3 | [
"A000567",
"A002414",
"A344376",
"A378361"
] | null | Kelvin Voskuijl, Nov 23 2024 | 2024-12-10T10:25:31 | oeisdata/seq/A378/A378361.seq | d28337a63d35256fa823d0082da35974 |
A378362 | Number of fixed site animals containing n nodes on the nodes of the cairo pentagonal tiling. | [
"6",
"10",
"24",
"68",
"198",
"594",
"1816",
"5650",
"17824",
"56836",
"182788",
"592060",
"1929676",
"6323418",
"20819284",
"68828316",
"228372578",
"760188362",
"2537770576",
"8494004948"
] | [
"nonn",
"hard",
"more"
] | 19 | 1 | 1 | [
"A001168",
"A001207",
"A001420",
"A196991",
"A196992",
"A196993",
"A197158",
"A197160",
"A197461",
"A197464",
"A197467",
"A378362"
] | null | Johann Peters, Nov 23 2024 | 2024-12-17T13:04:48 | oeisdata/seq/A378/A378362.seq | 0eb129a4e62fc372348fa32646e523c9 |
A378363 | Greatest number <= n that is 1 or not a perfect-power. | [
"1",
"2",
"3",
"3",
"5",
"6",
"7",
"7",
"7",
"10",
"11",
"12",
"13",
"14",
"15",
"15",
"17",
"18",
"19",
"20",
"21",
"22",
"23",
"24",
"24",
"26",
"26",
"28",
"29",
"30",
"31",
"31",
"33",
"34",
"35",
"35",
"37",
"38",
"39",
"40",
"41",
"42",
"43",
"44",
"45",
"46",
"47",
"48",
"48",
"50",
"51",
"52",
"53",
"54",
"55",
"56",
"57",
"58",
"59",
"60",
"61",
"62",
"63",
"63",
"65",
"66",
"67"
] | [
"nonn",
"changed"
] | 16 | 1 | 2 | [
"A000015",
"A000040",
"A000961",
"A001223",
"A001597",
"A007916",
"A007917",
"A007918",
"A014210",
"A014234",
"A031218",
"A045542",
"A052410",
"A053289",
"A057820",
"A065514",
"A067535",
"A069623",
"A070321",
"A076411",
"A076412",
"A081676",
"A113646",
"A120327",
"A131605",
"A151799",
"A159477",
"A162966",
"A179278",
"A188951",
"A345531",
"A375703",
"A375704",
"A375706",
"A375738",
"A375739",
"A377432",
"A377436",
"A377468",
"A378033",
"A378357",
"A378358",
"A378363",
"A378364",
"A378367",
"A378371",
"A378372"
] | null | Gus Wiseman, Nov 24 2024 | 2025-04-25T21:11:18 | oeisdata/seq/A378/A378363.seq | 6193db803049f403317c790d2ad5401e |
A378364 | Prime numbers such that the interval from the previous prime number contains a unique perfect power. | [
"2",
"5",
"17",
"53",
"67",
"83",
"101",
"131",
"149",
"173",
"197",
"223",
"227",
"251",
"257",
"293",
"331",
"347",
"367",
"401",
"443",
"487",
"521",
"541",
"577",
"631",
"677",
"733",
"787",
"853",
"907",
"967",
"1009",
"1031",
"1091",
"1163",
"1229",
"1297",
"1361",
"1373",
"1447",
"1523",
"1601",
"1693",
"1733",
"1777",
"1861",
"1949",
"2027",
"2053"
] | [
"nonn"
] | 18 | 1 | 1 | [
"A000040",
"A001223",
"A001597",
"A006512",
"A007916",
"A023055",
"A045542",
"A052410",
"A053289",
"A053607",
"A069623",
"A081676",
"A345531",
"A375706",
"A376560",
"A377287",
"A377432",
"A377434",
"A377436",
"A377466",
"A377468",
"A378364",
"A378374",
"A379154"
] | null | Gus Wiseman, Dec 16 2024 | 2024-12-18T23:32:25 | oeisdata/seq/A378/A378364.seq | 0bce0a876cc5bbd363747a273fac584f |
A378365 | Next prime index after each perfect power, duplicates removed. | [
"1",
"3",
"5",
"7",
"10",
"12",
"16",
"19",
"23",
"26",
"31",
"32",
"35",
"40",
"45",
"48",
"49",
"54",
"55",
"62",
"67",
"69",
"73",
"79",
"86",
"93",
"98",
"100",
"106",
"115",
"123",
"130",
"138",
"147",
"155",
"163",
"169",
"173",
"182",
"192",
"201",
"211",
"218",
"220",
"229",
"241",
"252",
"264",
"270",
"275",
"284",
"296",
"307",
"310",
"320",
"328",
"330",
"343"
] | [
"nonn"
] | 7 | 1 | 2 | [
"A000040",
"A000961",
"A001223",
"A001597",
"A007916",
"A045542",
"A052410",
"A053289",
"A057820",
"A065514",
"A068361",
"A069623",
"A076411",
"A076412",
"A080769",
"A081676",
"A216765",
"A345531",
"A375706",
"A377283",
"A377432",
"A377434",
"A377436",
"A377466",
"A377468",
"A378035",
"A378249",
"A378250",
"A378251",
"A378253",
"A378355",
"A378356",
"A378365"
] | null | Gus Wiseman, Nov 26 2024 | 2024-11-26T21:37:48 | oeisdata/seq/A378/A378365.seq | 40cac7ae7cf84b2b58df3e0b75b7183e |
A378366 | Difference between n and the greatest non prime power <= n (allowing 1). | [
"0",
"1",
"2",
"3",
"4",
"0",
"1",
"2",
"3",
"0",
"1",
"0",
"1",
"0",
"0",
"1",
"2",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"1",
"0",
"1",
"0",
"1",
"2",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"0",
"1",
"0",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"1",
"0",
"0",
"0",
"0"
] | [
"nonn"
] | 11 | 1 | 3 | [
"A000015",
"A000040",
"A000961",
"A001223",
"A007916",
"A007917",
"A007918",
"A007920",
"A010051",
"A013632",
"A024619",
"A031218",
"A053607",
"A057820",
"A064722",
"A065514",
"A069584",
"A070321",
"A074984",
"A075802",
"A080101",
"A081676",
"A113646",
"A151800",
"A179278",
"A246655",
"A276781",
"A304521",
"A345531",
"A361102",
"A366833",
"A375708",
"A375735",
"A377051",
"A377054",
"A377057",
"A377281",
"A377282",
"A377289",
"A378033",
"A378357",
"A378363",
"A378366",
"A378367",
"A378370",
"A378371",
"A378372",
"A378457"
] | null | Gus Wiseman, Nov 29 2024 | 2024-11-29T23:50:11 | oeisdata/seq/A378/A378366.seq | 12ada1cb1afc4cf5cbce2e19cea4e9ad |
A378367 | Greatest non prime power <= n, allowing 1. | [
"1",
"1",
"1",
"1",
"1",
"6",
"6",
"6",
"6",
"10",
"10",
"12",
"12",
"14",
"15",
"15",
"15",
"18",
"18",
"20",
"21",
"22",
"22",
"24",
"24",
"26",
"26",
"28",
"28",
"30",
"30",
"30",
"33",
"34",
"35",
"36",
"36",
"38",
"39",
"40",
"40",
"42",
"42",
"44",
"45",
"46",
"46",
"48",
"48",
"50",
"51",
"52",
"52",
"54",
"55",
"56",
"57",
"58",
"58",
"60",
"60",
"62",
"63",
"63",
"65",
"66",
"66"
] | [
"nonn"
] | 8 | 1 | 6 | [
"A000015",
"A000040",
"A000961",
"A001223",
"A007916",
"A007917",
"A007918",
"A007920",
"A010051",
"A013632",
"A024619",
"A031218",
"A053607",
"A057820",
"A064722",
"A065514",
"A069584",
"A070321",
"A074984",
"A080101",
"A081676",
"A113646",
"A151800",
"A179278",
"A246655",
"A276781",
"A304521",
"A345531",
"A361102",
"A366833",
"A375708",
"A375735",
"A377051",
"A377054",
"A377057",
"A377281",
"A377282",
"A377468",
"A378033",
"A378358",
"A378363",
"A378366",
"A378367",
"A378370",
"A378371",
"A378372",
"A378457"
] | null | Gus Wiseman, Nov 29 2024 | 2024-11-29T23:50:15 | oeisdata/seq/A378/A378367.seq | c6514383df750fc80d9a62e7a382d9f4 |
A378368 | Positions (in A001597) of consecutive perfect powers with a unique prime between them. | [
"15",
"20",
"22",
"295",
"1257"
] | [
"nonn",
"more"
] | 8 | 1 | 1 | [
"A000040",
"A001223",
"A001597",
"A007916",
"A023055",
"A045542",
"A046933",
"A052410",
"A053289",
"A053607",
"A067871",
"A069623",
"A076411",
"A076412",
"A080101",
"A080769",
"A081676",
"A178700",
"A274605",
"A375706",
"A375740",
"A377283",
"A377287",
"A377432",
"A377434",
"A377436",
"A377466",
"A377468",
"A378368",
"A378374",
"A379155"
] | null | Gus Wiseman, Dec 17 2024 | 2024-12-20T02:07:56 | oeisdata/seq/A378/A378368.seq | 23507e213d33f4d9c26b643ed6fe68e5 |
A378369 | Distance between n and the least nonsquarefree number >= n. | [
"3",
"2",
"1",
"0",
"3",
"2",
"1",
"0",
"0",
"2",
"1",
"0",
"3",
"2",
"1",
"0",
"1",
"0",
"1",
"0",
"3",
"2",
"1",
"0",
"0",
"1",
"0",
"0",
"3",
"2",
"1",
"0",
"3",
"2",
"1",
"0",
"3",
"2",
"1",
"0",
"3",
"2",
"1",
"0",
"0",
"2",
"1",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"1",
"0",
"3",
"2",
"1",
"0",
"2",
"1",
"0",
"0",
"3",
"2",
"1",
"0",
"3",
"2",
"1",
"0",
"2",
"1",
"0",
"0",
"3",
"2",
"1",
"0",
"0",
"2",
"1",
"0",
"3",
"2",
"1"
] | [
"nonn"
] | 7 | 1 | 1 | [
"A000015",
"A005117",
"A007675",
"A007918",
"A007920",
"A013929",
"A067535",
"A073247",
"A074984",
"A076259",
"A078147",
"A081221",
"A120327",
"A120992",
"A151800",
"A236575",
"A243348",
"A373415",
"A375707",
"A377046",
"A377468",
"A378033",
"A378039",
"A378086",
"A378357",
"A378358",
"A378369",
"A378370",
"A378371",
"A378372",
"A378373",
"A378458"
] | null | Gus Wiseman, Dec 01 2024 | 2024-12-02T09:50:05 | oeisdata/seq/A378/A378369.seq | e6d99560dcd4b1360b529aa788d568e1 |
A378370 | Distance between n and the least prime power >= n, allowing 1. | [
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"2",
"1",
"0",
"0",
"1",
"0",
"3",
"2",
"1",
"0",
"1",
"0",
"1",
"0",
"1",
"0",
"1",
"0",
"0",
"4",
"3",
"2",
"1",
"0",
"3",
"2",
"1",
"0",
"1",
"0",
"3",
"2",
"1",
"0",
"1",
"0",
"3",
"2",
"1",
"0",
"5",
"4",
"3",
"2",
"1",
"0",
"1",
"0",
"2",
"1",
"0",
"2",
"1",
"0",
"3",
"2",
"1",
"0",
"1",
"0",
"5",
"4",
"3",
"2",
"1",
"0",
"1",
"0",
"1",
"0",
"5",
"4",
"3",
"2"
] | [
"nonn"
] | 11 | 1 | 14 | [
"A000015",
"A000040",
"A000961",
"A001223",
"A001597",
"A007918",
"A007920",
"A013632",
"A024619",
"A031218",
"A053607",
"A053707",
"A057820",
"A065514",
"A065890",
"A067535",
"A069584",
"A074984",
"A080101",
"A081221",
"A081676",
"A151800",
"A246655",
"A276781",
"A304521",
"A343249",
"A345531",
"A361102",
"A366833",
"A375708",
"A375735",
"A376596",
"A376597",
"A377051",
"A377054",
"A377057",
"A377281",
"A377282",
"A377289",
"A377468",
"A377781",
"A378370",
"A378371",
"A378372",
"A378457"
] | null | Gus Wiseman, Nov 27 2024 | 2024-11-30T23:44:52 | oeisdata/seq/A378/A378370.seq | e67587bec4b5a1cf7b0c3693b1395574 |
A378371 | Distance between n and the least non prime power >= n, allowing 1. | [
"0",
"4",
"3",
"2",
"1",
"0",
"3",
"2",
"1",
"0",
"1",
"0",
"1",
"0",
"0",
"2",
"1",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"1",
"0",
"1",
"0",
"2",
"1",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"0",
"1",
"0",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"1",
"0",
"0",
"0",
"0"
] | [
"nonn"
] | 8 | 1 | 2 | [
"A000015",
"A000040",
"A000961",
"A001223",
"A007916",
"A007920",
"A010051",
"A013632",
"A024619",
"A031218",
"A053607",
"A053707",
"A057820",
"A065514",
"A067535",
"A074984",
"A080101",
"A081221",
"A113646",
"A120327",
"A151800",
"A246655",
"A276781",
"A304521",
"A343249",
"A345531",
"A361102",
"A366833",
"A375708",
"A375735",
"A376596",
"A376597",
"A377051",
"A377054",
"A377057",
"A377282",
"A377289",
"A377468",
"A378357",
"A378358",
"A378366",
"A378367",
"A378370",
"A378371",
"A378372",
"A378457"
] | null | Gus Wiseman, Nov 28 2024 | 2024-11-30T23:44:46 | oeisdata/seq/A378/A378371.seq | bb84c9df80275c36a38e38fa1b3686cd |
A378372 | Least non prime power >= n, allowing 1. | [
"1",
"6",
"6",
"6",
"6",
"6",
"10",
"10",
"10",
"10",
"12",
"12",
"14",
"14",
"15",
"18",
"18",
"18",
"20",
"20",
"21",
"22",
"24",
"24",
"26",
"26",
"28",
"28",
"30",
"30",
"33",
"33",
"33",
"34",
"35",
"36",
"38",
"38",
"39",
"40",
"42",
"42",
"44",
"44",
"45",
"46",
"48",
"48",
"50",
"50",
"51",
"52",
"54",
"54",
"55",
"56",
"57",
"58",
"60",
"60",
"62",
"62",
"63",
"65",
"65",
"66",
"68"
] | [
"nonn"
] | 7 | 1 | 2 | [
"A000015",
"A000040",
"A000961",
"A001223",
"A001597",
"A007916",
"A007920",
"A010051",
"A013632",
"A024619",
"A031218",
"A053607",
"A053707",
"A057820",
"A065514",
"A067535",
"A074984",
"A080101",
"A081221",
"A113646",
"A120327",
"A151800",
"A246655",
"A276781",
"A304521",
"A345531",
"A361102",
"A366833",
"A375708",
"A375735",
"A377051",
"A377057",
"A377281",
"A377282",
"A377289",
"A377468",
"A378357",
"A378358",
"A378366",
"A378367",
"A378370",
"A378371",
"A378372",
"A378457"
] | null | Gus Wiseman, Nov 29 2024 | 2024-11-30T23:44:38 | oeisdata/seq/A378/A378372.seq | 9f7cd0c4f613ce9ba00742e55bf49621 |
A378373 | Number of composite numbers (A002808) between consecutive nonsquarefree numbers (A013929), exclusive. | [
"1",
"0",
"1",
"2",
"0",
"0",
"2",
"0",
"1",
"0",
"1",
"3",
"2",
"1",
"0",
"1",
"0",
"0",
"1",
"0",
"1",
"2",
"1",
"0",
"2",
"2",
"1",
"0",
"2",
"0",
"1",
"3",
"0",
"1",
"3",
"0",
"0",
"0",
"1",
"2",
"2",
"2",
"0",
"2",
"0",
"2",
"0",
"0",
"0",
"2",
"2",
"0",
"1",
"3",
"2",
"0",
"0",
"0",
"0",
"2",
"2",
"1",
"0",
"2",
"0",
"1",
"0",
"1",
"0",
"2",
"2",
"3",
"0",
"1",
"2",
"0",
"0",
"3",
"2",
"0",
"2",
"3",
"3",
"2",
"0",
"1",
"2"
] | [
"nonn"
] | 6 | 1 | 4 | [
"A002808",
"A005117",
"A013929",
"A046933",
"A065890",
"A067535",
"A067871",
"A073247",
"A076259",
"A078147",
"A080101",
"A080769",
"A081221",
"A093555",
"A120327",
"A120944",
"A151800",
"A236575",
"A243348",
"A366833",
"A377046",
"A377432",
"A377436",
"A378033",
"A378039",
"A378086",
"A378369",
"A378373",
"A378456",
"A378614"
] | null | Gus Wiseman, Dec 02 2024 | 2024-12-02T10:10:34 | oeisdata/seq/A378/A378373.seq | 5ca1c68994d9f7b7d1604cd52eabfae1 |
A378374 | Perfect powers p such that the interval from the previous perfect power to p contains a unique prime. | [
"128",
"225",
"256",
"64009",
"1295044"
] | [
"nonn",
"more"
] | 5 | 1 | 1 | [
"A000040",
"A001223",
"A001597",
"A007916",
"A023055",
"A045542",
"A052410",
"A053289",
"A061398",
"A068360",
"A069623",
"A076411",
"A080769",
"A081676",
"A178700",
"A216765",
"A345531",
"A375706",
"A376560",
"A377281",
"A377287",
"A377430",
"A377431",
"A377468",
"A378035",
"A378082",
"A378249",
"A378250",
"A378251",
"A378253",
"A378355",
"A378356",
"A378364",
"A378374"
] | null | Gus Wiseman, Dec 17 2024 | 2024-12-18T23:32:21 | oeisdata/seq/A378/A378374.seq | 3b69ad1274be82bfe9c36d4a3093a3ba |
A378375 | Number of ways to go from n to 1 by the minimum number of steps of x -> 3x-1 if x odd, x -> 3x-1 or x/2 if x even. | [
"1",
"1",
"1",
"1",
"2",
"1",
"2",
"1",
"1",
"1",
"1",
"1",
"2",
"2",
"1",
"1",
"22",
"2",
"2",
"2",
"3",
"1",
"1",
"1",
"15",
"1",
"2",
"2",
"1",
"1",
"3",
"1",
"15",
"34",
"2",
"4",
"8",
"2",
"1",
"2",
"2",
"7",
"1",
"1",
"2",
"2",
"3",
"1",
"11",
"22",
"2",
"2",
"1",
"2",
"8",
"2",
"5",
"1",
"1",
"1",
"1",
"3",
"4",
"1",
"10",
"30",
"2",
"1",
"1",
"2",
"1",
"4",
"6",
"15",
"2",
"2",
"1",
"1",
"1",
"2",
"1",
"3",
"6",
"11"
] | [
"nonn"
] | 12 | 1 | 5 | [
"A261870",
"A378375"
] | null | Kevin Ryde, Nov 25 2024 | 2025-01-01T00:15:07 | oeisdata/seq/A378/A378375.seq | bdd10c5c8f62e124d8a1182398c284fb |
A378376 | Smallest starting x which requires n steps to reach 1 under the map x -> 3x-1 if x odd, x -> 3x-1 or x/2 if x even. | [
"1",
"2",
"4",
"8",
"3",
"6",
"11",
"22",
"43",
"15",
"29",
"10",
"20",
"7",
"14",
"5",
"9",
"18",
"35",
"13",
"23",
"46",
"91",
"31",
"61",
"21",
"41",
"81",
"161",
"55",
"109",
"37",
"73",
"25",
"49",
"17",
"33",
"65",
"129",
"257",
"87",
"173",
"341",
"117",
"225",
"455",
"153",
"305",
"607",
"209",
"405",
"809",
"273",
"543",
"185",
"369",
"721",
"1433",
"481",
"961",
"321"
] | [
"nonn"
] | 15 | 0 | 2 | [
"A261870",
"A378376"
] | null | Kevin Ryde, Nov 25 2024 | 2025-01-01T00:15:11 | oeisdata/seq/A378/A378376.seq | 84023a9b312edce15b2364da6107d168 |
A378377 | Triangle read by rows: T(n,k) is the number of non-descending sequences with length k such that the maximum of the length and the last number is n. | [
"1",
"1",
"3",
"1",
"3",
"10",
"1",
"4",
"10",
"35",
"1",
"5",
"15",
"35",
"126",
"1",
"6",
"21",
"56",
"126",
"462",
"1",
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"330",
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"24310",
"1",
"10",
"55",
"220",
"715",
"2002",
"5005",
"11440",
"24310",
"92378"
] | [
"nonn",
"tabl"
] | 19 | 1 | 3 | [
"A001700",
"A051924",
"A378377"
] | null | Zlatko Damijanic, Nov 24 2024 | 2024-12-06T11:18:29 | oeisdata/seq/A378/A378377.seq | 5358c571a003048fbcb0e0e1727145de |
A378378 | a(n) = Sum_{k=0..n} binomial(n,k) * binomial(n+3*k-1,3*k). | [
"1",
"2",
"16",
"170",
"1920",
"22402",
"266800",
"3222634",
"39328768",
"483752258",
"5987236816",
"74474238698",
"930212870784",
"11659157743170",
"146567181170160",
"1847198697449770",
"23332153206562816",
"295286370825453442",
"3743540075432798608",
"47532529217041519658",
"604366048841146280320"
] | [
"nonn"
] | 12 | 0 | 2 | [
"A123164",
"A333473",
"A378318",
"A378378"
] | null | Seiichi Manyama, Nov 24 2024 | 2024-11-24T08:31:25 | oeisdata/seq/A378/A378378.seq | 25aac5a563c14cbe78520bb12d757370 |
A378379 | Minimal x such that there is a partition of (x, x) into sums of distinct pairs of nonnegative integers with size at least n, excluding (0, 0). | [
"1",
"1",
"2",
"3",
"4",
"6",
"7",
"9",
"10",
"12",
"14",
"16",
"18",
"20",
"23",
"25",
"28",
"30",
"33",
"35",
"38",
"41",
"44",
"47",
"50",
"53",
"56",
"60",
"63",
"67",
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"74",
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"81",
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"92",
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"100",
"104",
"108",
"112",
"116",
"120",
"125",
"129",
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"138",
"143",
"147",
"152",
"156",
"161",
"165",
"170",
"175",
"180",
"185",
"190",
"195",
"200",
"205",
"210",
"215",
"220"
] | [
"nonn"
] | 16 | 1 | 3 | [
"A054242",
"A086435",
"A201377",
"A378126",
"A378379"
] | null | Jimin Park, Nov 24 2024 | 2024-12-12T23:08:39 | oeisdata/seq/A378/A378379.seq | 0cbc9ba2c4ca5b36a5a6be8c82cb8e88 |
A378380 | Semiperimeter of the unique primitive Pythagorean triple whose inradius is A002315(n) and such that its long leg and its hypotenuse are consecutive natural numbers. | [
"6",
"120",
"3486",
"114960",
"3885078",
"131860680",
"4478696046",
"152139829920",
"5168252353446",
"175568305155480",
"5964153335910078",
"202605640528682160",
"6882627597903676086",
"233806732532369766120",
"7942546277594444747406",
"269812766700385236436800",
"9165691521504650726475078",
"311363698964277915773152440"
] | [
"nonn",
"easy"
] | 29 | 0 | 1 | [
"A002315",
"A377025",
"A378380",
"A378386"
] | null | Miguel-Ángel Pérez García-Ortega, Nov 24 2024 | 2024-12-11T19:21:43 | oeisdata/seq/A378/A378380.seq | 9563a589a5825582f8fa865818126835 |
A378381 | Lexicographically earliest sequence such that each set of terms enclosed by two equal values, including the endpoints, contains a distinct number of elements. | [
"1",
"1",
"2",
"3",
"2",
"4",
"3",
"5",
"6",
"4",
"7",
"3",
"8",
"9",
"5",
"10",
"6",
"11",
"12",
"7",
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"3",
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"15",
"16",
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"5",
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"17",
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"38",
"39",
"18",
"40",
"5",
"41",
"42",
"43",
"19",
"44",
"20",
"45"
] | [
"nonn"
] | 23 | 1 | 3 | [
"A366691",
"A378381"
] | null | Neal Gersh Tolunsky, Nov 26 2024 | 2024-11-28T11:26:22 | oeisdata/seq/A378/A378381.seq | ec7550e8359011e6426502a9f3835744 |
A378382 | Number of maximal chains in the poset of all binary words of length <= n, ordered by B covers A iff A_i <= B_{i+k} for all i in A and some k >= 0. | [
"1",
"1",
"2",
"5",
"16",
"57",
"226",
"961",
"4376",
"21041",
"106534",
"563961",
"3112924",
"17839993",
"105907946",
"649432673",
"4105783696",
"26706965985",
"178466243662",
"1223248786921",
"8589272300516",
"61708802126441",
"453143009601682",
"3397715981566545",
"25990997059282456",
"202666687407866257"
] | [
"nonn"
] | 22 | 0 | 3 | [
"A034841",
"A143672",
"A282698",
"A317145",
"A378382",
"A378588",
"A378608"
] | null | John Tyler Rascoe, Nov 26 2024 | 2024-12-03T09:04:35 | oeisdata/seq/A378/A378382.seq | cd2f18d14474a1571516eb169321c094 |
A378383 | Number of subwords of the form UDDD in nondecreasing Dyck paths of length 2*n. | [
"0",
"0",
"0",
"1",
"5",
"19",
"64",
"202",
"612",
"1803",
"5206",
"14809",
"41650",
"116114",
"321478",
"885169",
"2426462",
"6627499",
"18048088",
"49026874",
"132901176",
"359625015",
"971639014",
"2621683741",
"7065545950",
"19022080034",
"51163908874",
"137499581917",
"369235213742",
"990822728623",
"2657069356996"
] | [
"nonn",
"easy"
] | 17 | 0 | 5 | [
"A000032",
"A000045",
"A375995",
"A377670",
"A377679",
"A377857",
"A377866",
"A377867",
"A378383"
] | null | Rigoberto Florez, Nov 24 2024 | 2025-03-04T08:36:16 | oeisdata/seq/A378/A378383.seq | 3b9a220cd10184fb17026203fc5fd0cb |
A378384 | Digital root of the sum of the previous 3 terms; a(0) = a(1) = a(2) = 1. | [
"1",
"1",
"1",
"3",
"5",
"9",
"8",
"4",
"3",
"6",
"4",
"4",
"5",
"4",
"4",
"4",
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"2",
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"2",
"1",
"3",
"6",
"1",
"1",
"8",
"1",
"1",
"1",
"3",
"5",
"9",
"8",
"4",
"3",
"6"
] | [
"nonn",
"base",
"easy"
] | 20 | 0 | 4 | [
"A000213",
"A010888",
"A112661",
"A378384"
] | null | James C. McMahon, Nov 24 2024 | 2024-12-21T00:42:48 | oeisdata/seq/A378/A378384.seq | eccb08e95bce30bb3297a6a235340bf6 |
A378385 | a(n) is the length of the largest finite maximal run of consecutive integers missing from the set {A377091(k), k = 0..n}, or 0 if no such run exists. | [
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"3",
"2",
"1",
"0",
"0",
"0",
"0",
"0",
"4",
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"1",
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"0",
"0",
"0",
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"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"7",
"3",
"3",
"3",
"3",
"2",
"1",
"0",
"0",
"0",
"0",
"0",
"0"
] | [
"nonn"
] | 22 | 0 | 14 | [
"A377091",
"A378385",
"A380263"
] | null | Rémy Sigrist, Feb 05 2025 | 2025-02-06T10:24:11 | oeisdata/seq/A378/A378385.seq | 39306b2314cd44fcefa8b7a692d41808 |
A378386 | Area of the unique primitive Pythagorean triple whose inradius is A002315(n) and such that its long leg and its hypotenuse are consecutive natural numbers. | [
"6",
"840",
"142926",
"27475440",
"5411913654",
"1070576860920",
"211936375592766",
"41961230070745440",
"8308074191463867366",
"1644955457291036718120",
"325692829279638552084654",
"64485533774729467185564240",
"12767809944726167559580210326",
"2527961881828880059792526682840",
"500523684734657069477415103656606"
] | [
"nonn",
"easy"
] | 6 | 0 | 1 | [
"A002315",
"A377025",
"A378380",
"A378386"
] | null | Miguel-Ángel Pérez García-Ortega, Nov 24 2024 | 2024-12-11T19:21:47 | oeisdata/seq/A378/A378386.seq | ce5ed9f54315de8004390758aa314256 |
A378387 | a(n) is the number of proper divisors d of n such that (-d)^n == -d (mod n). | [
"0",
"1",
"1",
"0",
"1",
"2",
"1",
"0",
"1",
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"2",
"0",
"1",
"2",
"2",
"1",
"2",
"1",
"2",
"1",
"1",
"1",
"1",
"0"
] | [
"nonn"
] | 39 | 1 | 6 | [
"A032741",
"A371883",
"A378387"
] | null | Juri-Stepan Gerasimov, Dec 23 2024 | 2025-01-23T12:38:50 | oeisdata/seq/A378/A378387.seq | 778c5bbe97ab33590e683858f6cad753 |
A378388 | Decimal expansion of the surface area of a tetrakis hexahedron with unit shorter edge length. | [
"1",
"1",
"9",
"2",
"5",
"6",
"9",
"5",
"8",
"7",
"9",
"9",
"9",
"8",
"8",
"7",
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"0",
"0",
"6",
"8",
"2",
"9",
"2",
"7",
"9",
"6",
"8",
"7",
"6",
"8",
"7",
"6",
"8"
] | [
"nonn",
"cons",
"easy"
] | 10 | 2 | 3 | [
"A002163",
"A010532",
"A179587",
"A208899",
"A374359",
"A377341",
"A378388",
"A378389"
] | null | Paolo Xausa, Nov 27 2024 | 2024-11-28T11:11:27 | oeisdata/seq/A378/A378388.seq | e83cba260166ce45fd3ddfa85a978477 |
A378389 | Decimal expansion of the dihedral angle, in radians, between any two adjacent faces in a tetrakis hexahedron. | [
"2",
"4",
"9",
"8",
"0",
"9",
"1",
"5",
"4",
"4",
"7",
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"3",
"1",
"4",
"7",
"4",
"5",
"8",
"7",
"9",
"0",
"9",
"9",
"1",
"5",
"2",
"1",
"7",
"9",
"8"
] | [
"nonn",
"cons",
"easy"
] | 12 | 1 | 1 | [
"A010532",
"A156546",
"A179587",
"A195698",
"A195729",
"A374359",
"A378388",
"A378389"
] | null | Paolo Xausa, Nov 27 2024 | 2024-11-28T11:11:37 | oeisdata/seq/A378/A378389.seq | ac293c6a366479e5ccd9df4a1706ee3c |
A378390 | Decimal expansion of the surface area of a deltoidal icositetrahedron with unit shorter edge length. | [
"3",
"0",
"6",
"9",
"4",
"8",
"9",
"5",
"7",
"2",
"4",
"0",
"3",
"1",
"0",
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"8",
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"8",
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"1",
"2",
"5",
"1",
"5",
"6",
"7",
"7",
"9",
"0",
"3",
"1",
"3",
"6"
] | [
"nonn",
"cons",
"easy"
] | 8 | 2 | 1 | [
"A010466",
"A343964",
"A378390",
"A378391",
"A378392",
"A378393",
"A378394"
] | null | Paolo Xausa, Nov 29 2024 | 2025-02-11T09:56:55 | oeisdata/seq/A378/A378390.seq | d12b03f16c6af96776c35bb914d92cca |
A378391 | Decimal expansion of the volume of a deltoidal icositetrahedron with unit shorter edge length. | [
"1",
"4",
"9",
"1",
"3",
"3",
"8",
"8",
"7",
"1",
"3",
"7",
"8",
"6",
"3",
"3",
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"1",
"2",
"5",
"2",
"2",
"6",
"9",
"4",
"8",
"2",
"1",
"7",
"0"
] | [
"nonn",
"cons",
"easy"
] | 8 | 2 | 2 | [
"A002193",
"A343965",
"A378390",
"A378391",
"A378392",
"A378393",
"A378394"
] | null | Paolo Xausa, Nov 30 2024 | 2025-02-11T09:57:20 | oeisdata/seq/A378/A378391.seq | e0f14a28a5463d8fdb05f54f7f601f4c |
A378392 | Decimal expansion of the inradius of a deltoidal icositetrahedron with unit shorter edge length. | [
"1",
"4",
"5",
"7",
"5",
"7",
"6",
"7",
"4",
"3",
"1",
"6",
"9",
"4",
"5",
"0",
"6",
"6",
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"1",
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"3",
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"7",
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"9",
"8",
"5",
"6",
"1",
"2",
"8",
"3"
] | [
"nonn",
"cons",
"easy"
] | 10 | 1 | 2 | [
"A002193",
"A378390",
"A378391",
"A378392",
"A378393",
"A378394"
] | null | Paolo Xausa, Nov 30 2024 | 2025-02-11T09:57:45 | oeisdata/seq/A378/A378392.seq | 315432fe645179de6241dbccfd3988d0 |
A378393 | Decimal expansion of the midradius of a deltoidal icositetrahedron with unit shorter edge length. | [
"1",
"5",
"6",
"0",
"6",
"6",
"0",
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] | [
"nonn",
"cons",
"easy"
] | 12 | 1 | 2 | [
"A010474",
"A093577",
"A285871",
"A378390",
"A378391",
"A378392",
"A378393",
"A378394"
] | null | Paolo Xausa, Nov 30 2024 | 2025-02-03T10:02:46 | oeisdata/seq/A378/A378393.seq | a3bc24c00b54c345b4747e677d77b3a6 |
A378394 | Decimal expansion of the dihedral angle, in radians, between any two adjacent faces in a deltoidal icositetrahedron. | [
"2",
"4",
"1",
"0",
"6",
"1",
"3",
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] | [
"nonn",
"cons",
"easy"
] | 10 | 1 | 1 | [
"A177870",
"A195702",
"A378390",
"A378391",
"A378392",
"A378393",
"A378394"
] | null | Paolo Xausa, Nov 30 2024 | 2025-02-11T09:58:56 | oeisdata/seq/A378/A378394.seq | 09aa85ab8dcbf93a6644aafef20be514 |
A378395 | Sequence of primitive Pythagorean triples beginning with the triple (3,4,5), with each subsequent triple having as its inradius the hypotenuse of the previous triple, and with the long leg and the hypotenuse of each triple being consecutive natural numbers. | [
"3",
"4",
"5",
"11",
"60",
"61",
"123",
"7564",
"7565",
"15131",
"114473580",
"114473581",
"228947163",
"26208401722874284",
"26208401722874285",
"52416803445748571",
"1373760641735119632984407274271020",
"1373760641735119632984407274271021"
] | [
"nonn",
"tabf"
] | 10 | 1 | 1 | [
"A102847",
"A365577",
"A365578",
"A365796",
"A378395"
] | null | Miguel-Ángel Pérez García-Ortega, Nov 24 2024 | 2024-12-11T19:22:20 | oeisdata/seq/A378/A378395.seq | 442b391761e4f067c345c487bd72eb4f |
A378396 | Rectangular array read by descending antidiagonals: (row 1) = u, and for n >= 2, (row n) = u-inverse runlength sequence of u, where u = 1 + A010060. See Comments. | [
"1",
"2",
"2",
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"1",
"2",
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"1",
"2",
"2",
"1",
"2",
"1",
"1",
"2",
"2",
"2",
"2"
] | [
"nonn",
"tabl"
] | 9 | 1 | 2 | [
"A010060",
"A378282",
"A378396",
"A378397",
"A378398",
"A378399",
"A378401"
] | null | Clark Kimberling, Dec 21 2024 | 2025-01-11T04:10:09 | oeisdata/seq/A378/A378396.seq | 56459fa167455cfcf0f92378afa0302a |
A378397 | Rectangular array read by descending antidiagonals: (row 1) = u, and for n >= 2, (row n) = u-inverse runlength sequence of u, where u = A003842 (an infinite Fibonacci word). See Comments. | [
"1",
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"2",
"1",
"1",
"1",
"1",
"1",
"1",
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"2",
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"2",
"2",
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"1",
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"1",
"1",
"1",
"2",
"1",
"1",
"2",
"1",
"1",
"1",
"1",
"1"
] | [
"nonn",
"tabl"
] | 8 | 1 | 2 | [
"A003842",
"A378282",
"A378396",
"A378397",
"A378398",
"A378399",
"A378401"
] | null | Clark Kimberling, Dec 21 2024 | 2025-01-11T04:10:23 | oeisdata/seq/A378/A378397.seq | b3c05b7e6fa62edb6f65146821d80cfb |
A378398 | Rectangular array read by descending antidiagonals: (row 1) = u, and for n >= 2, (row n) = u-inverse runlength sequence of u, where u = A014675 (an infinite Fibonacci word). See Comments. | [
"2",
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"1",
"2",
"1",
"2",
"2",
"2",
"1",
"2",
"1",
"1",
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"2",
"1",
"2",
"1",
"1",
"2",
"2",
"1",
"2",
"2",
"1",
"2"
] | [
"nonn",
"tabl"
] | 8 | 1 | 1 | [
"A014675",
"A378282",
"A378396",
"A378397",
"A378398",
"A378399",
"A378401"
] | null | Clark Kimberling, Dec 21 2024 | 2025-01-11T04:10:33 | oeisdata/seq/A378/A378398.seq | 1ecaef3885a0b1be12a612a9d5f60a7a |
A378399 | Rectangular array read by descending antidiagonals: (row 1) = u, and for n >= 2, (row n) = u-inverse runlength sequence of u, where u = A006337 (a Beatty difference sequence). See Comments. | [
"1",
"2",
"2",
"1",
"1",
"1",
"2",
"1",
"1",
"2",
"1",
"2",
"2",
"1",
"1",
"1",
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"1",
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"1",
"1",
"1",
"1",
"2",
"2",
"2",
"2",
"2",
"2",
"2"
] | [
"nonn",
"tabl"
] | 8 | 1 | 2 | [
"A006337",
"A378282",
"A378396",
"A378397",
"A378398",
"A378399",
"A378401"
] | null | Clark Kimberling, Dec 21 2024 | 2025-01-11T04:10:41 | oeisdata/seq/A378/A378399.seq | 7652f07f9493ff9f1d173d3c4da3d442 |
A378400 | Number of subsets of {1,2,3,...,n}^2 with the property that every point has exactly two other closest points. | [
"1",
"1",
"2",
"8",
"52",
"676",
"14463"
] | [
"nonn",
"hard",
"more"
] | 12 | 0 | 3 | [
"A297664",
"A378400"
] | null | Erich Friedman, Nov 24 2024 | 2025-01-01T18:13:25 | oeisdata/seq/A378/A378400.seq | 27775194057bfc1bc216c9dc18cca7b9 |
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