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A355801 | Irregular table read by rows: T(n,k) is the number of k-sided polygons, for k>=3, in a square when straight line segments connect the n-1 points between each corner that divide each edge into n equal parts to the n-1 points on the edge on the opposite side of the square. | [
"0",
"1",
"0",
"4",
"12",
"12",
"56",
"32",
"16",
"156",
"124",
"24",
"8",
"0",
"4",
"384",
"228",
"72",
"28",
"716",
"648",
"144",
"68",
"8",
"4",
"1312",
"1144",
"240",
"112",
"8",
"2244",
"1912",
"528",
"256",
"3528",
"3072",
"696",
"360",
"16",
"5012",
"5536",
"1296",
"524",
"48",
"28",
"7696",
"6596",
"1960",
"572",
"16",
"10340",
"11448",
"2968",
"1028",
"160",
"24",
"14520",
"14428",
"3872",
"1156",
"104",
"8"
]
| [
"nonn",
"tabf",
"look"
]
| 17 | 1 | 4 | [
"A255011",
"A290131",
"A331452",
"A335678",
"A355798",
"A355799",
"A355800",
"A355801"
]
| null | Scott R. Shannon, Jul 17 2022 | 2024-01-04T14:29:31 | oeisdata/seq/A355/A355801.seq | 85a55d4bd153f911e4d9477bb05e16fe |
A355802 | A variant of Pascal's triangle (A007318) where new rows are added cyclically below, to the right and to the left. | [
"1",
"1",
"1",
"1",
"2",
"1",
"1",
"2",
"2",
"1",
"1",
"2",
"2",
"2",
"1",
"1",
"2",
"3",
"3",
"2",
"1",
"1",
"2",
"3",
"4",
"3",
"2",
"1",
"1",
"2",
"3",
"4",
"4",
"3",
"2",
"1",
"1",
"2",
"3",
"5",
"6",
"5",
"3",
"2",
"1",
"1",
"2",
"3",
"5",
"7",
"7",
"5",
"3",
"2",
"1",
"1",
"2",
"3",
"5",
"7",
"8",
"7",
"5",
"3",
"2",
"1",
"1",
"2",
"3",
"5",
"8",
"11",
"11",
"8",
"5",
"3",
"2",
"1",
"1",
"2",
"3",
"5",
"8",
"12",
"14",
"12",
"8",
"5",
"3",
"2",
"1"
]
| [
"nonn",
"tabl"
]
| 13 | 0 | 5 | [
"A007318",
"A355802",
"A355806"
]
| null | Rémy Sigrist, Jul 17 2022 | 2022-07-19T10:43:31 | oeisdata/seq/A355/A355802.seq | 7f996f8b4b42bbf8c030fa7efc59ff60 |
A355803 | Lower twin primes p such that p*(p+2)+p-1, p*(p+2)+p+1 and p*(p+2)+p+3 have at most four distinct prime factors between them. | [
"3",
"5",
"137",
"5639",
"13397",
"33599",
"178247",
"181607",
"255467",
"380867",
"415379",
"439007",
"486677",
"670037",
"931727",
"970787",
"1163717",
"1244987",
"1259537",
"1343057",
"1384067",
"1453547",
"1540709",
"1596347",
"1619417",
"1793357",
"1908659",
"2027897",
"2097479",
"2161637",
"2276999",
"2840777",
"3163967",
"3327167",
"3536789",
"3633347"
]
| [
"nonn"
]
| 9 | 1 | 1 | [
"A001359",
"A355803"
]
| null | J. M. Bergot and Robert Israel, Jul 17 2022 | 2022-08-03T23:23:01 | oeisdata/seq/A355/A355803.seq | db9ed30ac73801fa5ce4539ee7ce1591 |
A355804 | First of 6 consecutive primes p1,p2,p3,p4,p5,p6 such that (p2-p1)*(p5+p6)+(p3-p2)*(p4+p5)-1 and (p2-p1)*(p5+p6)+(p3-p2)*(p4+p5)+1 are primes. | [
"2",
"3",
"5",
"7",
"23",
"73",
"97",
"277",
"617",
"653",
"683",
"811",
"839",
"877",
"1097",
"2029",
"2549",
"3037",
"3067",
"3329",
"3499",
"3659",
"3769",
"3929",
"4127",
"4283",
"4423",
"4447",
"4483",
"4673",
"4871",
"5023",
"5197",
"5261",
"5351",
"5503",
"5623",
"5701",
"6143",
"6323",
"6703",
"6803",
"6823",
"7109",
"7151",
"7187",
"7433",
"7583",
"7907",
"8849",
"8861",
"9203",
"9403",
"9419"
]
| [
"nonn"
]
| 10 | 1 | 1 | [
"A014574",
"A355804"
]
| null | J. M. Bergot and Robert Israel, Jul 17 2022 | 2023-06-07T16:38:39 | oeisdata/seq/A355/A355804.seq | a0be85dbc23d44b310942af1ccaca038 |
A355805 | Number of compositions (ordered partitions) of n into Pell numbers (A000129). | [
"1",
"1",
"2",
"3",
"5",
"9",
"15",
"26",
"44",
"75",
"128",
"218",
"373",
"636",
"1086",
"1853",
"3162",
"5397",
"9210",
"15719",
"26826",
"45782",
"78133",
"133343",
"227568",
"388373",
"662809",
"1131168",
"1930482",
"3294616",
"5622682",
"9595828",
"16376507",
"27948604",
"47697869",
"81402513",
"138923804",
"237091241"
]
| [
"nonn"
]
| 21 | 0 | 3 | [
"A000129",
"A076739",
"A290807",
"A290808",
"A355805"
]
| null | Ilya Gutkovskiy, Oct 02 2022 | 2022-10-02T10:29:20 | oeisdata/seq/A355/A355805.seq | 6c1218cf31afb4dd470e02b65a6d97d4 |
A355806 | a(n) is the number of odd terms in n-th row of triangle A355802. | [
"1",
"2",
"2",
"2",
"2",
"4",
"4",
"4",
"6",
"8",
"8",
"8",
"6",
"8",
"10",
"8",
"10",
"12",
"12",
"16",
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"18",
"20",
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"18",
"16",
"22",
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"24",
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"34",
"40",
"32",
"36",
"42",
"36",
"42",
"44",
"36",
"40",
"46"
]
| [
"nonn"
]
| 10 | 0 | 2 | [
"A355802",
"A355806"
]
| null | Rémy Sigrist, Jul 18 2022 | 2022-07-19T10:43:26 | oeisdata/seq/A355/A355806.seq | ea393ea6a5f0824e91cc0718d2412cb3 |
A355807 | a(n) is the number at the apex of a triangle whose base contains the distinct powers of 2 summing to n (in ascending order), and each number in a higher row is the absolute difference of the two numbers directly below it; a(0) = 0. | [
"0",
"1",
"2",
"1",
"4",
"3",
"2",
"1",
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"6",
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"49",
"50"
]
| [
"nonn",
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]
| 12 | 0 | 3 | [
"A133457",
"A334387",
"A348296",
"A355807",
"A355808",
"A355809",
"A355810",
"A355811"
]
| null | Rémy Sigrist, Jul 18 2022 | 2022-07-19T10:43:34 | oeisdata/seq/A355/A355807.seq | 95face193d50ba7d84b6c4105cadd298 |
A355808 | a(n) is the number at the apex of a triangle whose base contains the distinct powers of 2 summing to n (in ascending order), and each number in a higher row is the difference of the two numbers directly below it; a(0) = 0. | [
"0",
"1",
"2",
"1",
"4",
"3",
"2",
"1",
"8",
"7",
"6",
"5",
"4",
"1",
"2",
"1",
"16",
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]
| [
"sign",
"base"
]
| 10 | 0 | 3 | [
"A348296",
"A355807",
"A355808"
]
| null | Rémy Sigrist, Jul 18 2022 | 2022-07-19T10:43:22 | oeisdata/seq/A355/A355808.seq | 3a4a97fa0d728794c6e42e9bcfe6af2d |
A355809 | a(n) is the number at the apex of a triangle whose base contains the distinct powers of 2 summing to n (in ascending order), and each number in a higher row is the sum of the two numbers directly below it; a(0) = 0. | [
"0",
"1",
"2",
"3",
"4",
"5",
"6",
"9",
"8",
"9",
"10",
"13",
"12",
"17",
"18",
"27",
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"21",
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"72",
"105",
"106",
"153",
"108",
"161",
"162",
"243",
"64",
"65"
]
| [
"nonn",
"base"
]
| 9 | 0 | 3 | [
"A048645",
"A348296",
"A355807",
"A355809"
]
| null | Rémy Sigrist, Jul 18 2022 | 2022-07-19T10:43:15 | oeisdata/seq/A355/A355809.seq | 0bf6b09d754ab7f9e5d866e130dc6ee6 |
A355810 | a(n) is the number at the apex of a triangle whose base contains the distinct powers of 2 summing to n (in ascending order), and each number in a higher row is the bitwise XOR of the two numbers directly below it; a(0) = 0. | [
"0",
"1",
"2",
"3",
"4",
"5",
"6",
"5",
"8",
"9",
"10",
"9",
"12",
"9",
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"51",
"64",
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"66",
"65"
]
| [
"nonn",
"base"
]
| 9 | 0 | 3 | [
"A143071",
"A348296",
"A355807",
"A355810"
]
| null | Rémy Sigrist, Jul 18 2022 | 2022-07-19T10:43:19 | oeisdata/seq/A355/A355810.seq | a11a8c331805f916d91ff9d56787ed64 |
A355811 | a(n) is the number at the apex of a triangle whose base contains the distinct powers of 2 summing to n (in ascending order), and each number in a higher row is the product of the two numbers directly below it; a(0) = 1. | [
"1",
"1",
"2",
"2",
"4",
"4",
"8",
"16",
"8",
"8",
"16",
"32",
"32",
"128",
"256",
"4096",
"16",
"16",
"32",
"64",
"64",
"256",
"512",
"8192",
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"1024",
"2048",
"65536",
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"524288",
"1048576",
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"256",
"2048",
"4096",
"131072",
"8192",
"1048576",
"2097152",
"8589934592",
"512"
]
| [
"nonn",
"base"
]
| 5 | 0 | 3 | [
"A048896",
"A348296",
"A355807",
"A355811"
]
| null | Rémy Sigrist, Jul 18 2022 | 2022-07-19T08:10:25 | oeisdata/seq/A355/A355811.seq | e3946c011502b63fab8becc44a3f4ddd |
A355812 | Values t of the solutions to 1/s^2 + 1/t^2 = 1/p^2 + 1/q^2 where p,q < t. | [
"35",
"55",
"56",
"63",
"70",
"72",
"80",
"85",
"90",
"105",
"110",
"112",
"117",
"120",
"126",
"140",
"144",
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"297",
"304",
"306",
"308",
"312",
"315",
"320",
"330",
"336"
]
| [
"nonn"
]
| 11 | 1 | 1 | [
"A355812",
"A355813",
"A355814"
]
| null | Jianing Song, Jul 18 2022 | 2022-07-18T22:49:38 | oeisdata/seq/A355/A355812.seq | 92cd45dde8f0c7b6494b3bb0615c87f3 |
A355813 | Number of solutions (p,q) to 1/s^2 + 1/t^2 = 1/p^2 + 1/q^2 where p,q < t = A355812(n). | [
"1",
"2",
"2",
"2",
"1",
"2",
"2",
"2",
"2",
"1",
"2",
"2",
"2",
"2",
"2",
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]
| [
"nonn"
]
| 11 | 1 | 2 | [
"A355812",
"A355813",
"A355814"
]
| null | Jianing Song, Jul 18 2022 | 2022-07-18T22:49:42 | oeisdata/seq/A355/A355813.seq | 7e2b748e37c1af33161645f62e7f9b0b |
A355814 | Smallest value t such that 1/s^2 + 1/t^2 = 1/p^2 + 1/q^2 has exactly n solutions (p,q) where p,q < t; or -1 if no such t exists. | [
"35",
"55",
"210",
"240",
"595",
"360",
"560",
"504",
"630",
"720",
"1295",
"1848",
"1890",
"1386",
"1680",
"2640",
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"13104",
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"17550",
"10920",
"18720",
"15120",
"22176"
]
| [
"nonn"
]
| 24 | 1 | 1 | [
"A328151",
"A355812",
"A355813",
"A355814"
]
| null | Jianing Song, Jul 18 2022 | 2025-01-25T04:49:35 | oeisdata/seq/A355/A355814.seq | 0bc1f23d185f27729a360759006f2a83 |
A355815 | a(n) = gcd(A276086(n), A277791(n)), where A276086 is primorial base exp-function and A277791 is the denominator of sum of reciprocals of proper divisors of n. | [
"1",
"1",
"1",
"1",
"1",
"1",
"1",
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]
| [
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]
| 14 | 1 | 9 | [
"A048103",
"A276086",
"A277791",
"A327858",
"A355003",
"A355815"
]
| null | Antti Karttunen, Jul 18 2022 | 2022-07-19T01:13:45 | oeisdata/seq/A355/A355815.seq | 609bba54730b2010f481c65b6023cd76 |
A355816 | a(n) = 1 if n and sigma(n) are relatively prime, and n has at least two distinct prime factors, otherwise 0. | [
"0",
"0",
"0",
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"0",
"0",
"0",
"1",
"0"
]
| [
"nonn"
]
| 10 | 1 | null | [
"A001221",
"A009194",
"A095738",
"A143731",
"A325964",
"A355816"
]
| null | Antti Karttunen, Jul 18 2022 | 2022-07-18T22:50:01 | oeisdata/seq/A355/A355816.seq | 11a9b7ecf92160adca2c6cd4c4cd2daf |
A355817 | Dirichlet inverse of A010055, characteristic function of powers of primes. | [
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]
| [
"sign"
]
| 15 | 1 | 6 | [
"A010055",
"A050363",
"A335452",
"A355817",
"A355827",
"A355939"
]
| null | Antti Karttunen, Jul 19 2022 | 2022-07-21T16:16:11 | oeisdata/seq/A355/A355817.seq | 2292da8ab2e462813dec944c856a4e82 |
A355818 | Greatest common divisor of n, sigma(n) and A276086(n), where A276086 is primorial base exp-function. | [
"1",
"1",
"1",
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]
| [
"nonn"
]
| 11 | 1 | 15 | [
"A000203",
"A009194",
"A048103",
"A276086",
"A324198",
"A324644",
"A327858",
"A355456",
"A355815",
"A355818"
]
| null | Antti Karttunen, Jul 19 2022 | 2022-07-20T08:49:52 | oeisdata/seq/A355/A355818.seq | 4466823f816271cbf7fbb1268d04ea65 |
A355819 | Dirichlet inverse of A270419, denominator of the rational number obtained when the exponents in prime factorization of n are reinterpreted as alternating binary sums (A065620). | [
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]
| [
"sign",
"mult"
]
| 9 | 1 | 16 | [
"A065620",
"A270419",
"A355819",
"A355826"
]
| null | Antti Karttunen, Jul 19 2022 | 2022-07-20T08:49:57 | oeisdata/seq/A355/A355819.seq | 11c55efd474ffb12b67eb2cbc680a4ac |
A355820 | a(n) = 1 if A003961(n) and A276086(n) are relatively prime, otherwise 0, where A003961 is fully multiplicative with a(p) = nextprime(p), and A276086 is primorial base exp-function. | [
"1",
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]
| [
"nonn"
]
| 9 | 1 | null | [
"A003961",
"A276086",
"A355442",
"A355820",
"A355821",
"A355822"
]
| null | Antti Karttunen, Jul 18 2022 | 2022-07-18T14:17:26 | oeisdata/seq/A355/A355820.seq | f364ffacf864f4be753b3468d3b9ee33 |
A355821 | Numbers k for which A003961(k) and A276086(k) are relatively prime, where A003961 is fully multiplicative with a(p) = nextprime(p), and A276086 is primorial base exp-function. | [
"1",
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]
| [
"nonn"
]
| 9 | 1 | 2 | [
"A003961",
"A276086",
"A324583",
"A355001",
"A355442",
"A355820",
"A355821",
"A355822"
]
| null | Antti Karttunen, Jul 18 2022 | 2022-07-18T14:16:33 | oeisdata/seq/A355/A355821.seq | 4aa7d83247360e81b95e170e403ad4da |
A355822 | Numbers k such that A003961(k) and A276086(k) share a prime factor, where A003961 is fully multiplicative with a(p) = nextprime(p), and A276086 is primorial base exp-function. | [
"2",
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]
| [
"nonn"
]
| 16 | 1 | 1 | [
"A003961",
"A005843",
"A276086",
"A324584",
"A355001",
"A355002",
"A355442",
"A355820",
"A355821",
"A355822",
"A355835"
]
| null | Antti Karttunen, Jul 18 2022 | 2022-07-21T16:14:58 | oeisdata/seq/A355/A355822.seq | 320a9514e84645d9bc80ff36db2643ce |
A355823 | a(n) = 1 if all exponents in prime factorization of n are powers of 2, otherwise 0. | [
"1",
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"1",
"1",
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"1",
"0",
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]
| [
"nonn",
"mult"
]
| 21 | 1 | null | [
"A000079",
"A091862",
"A138302",
"A209229",
"A225546",
"A271727",
"A302777",
"A355823",
"A355824",
"A355825"
]
| null | Antti Karttunen, Jul 19 2022 | 2022-07-23T05:26:41 | oeisdata/seq/A355/A355823.seq | e8d31085784263bd4d405d77a8b570a7 |
A355824 | Dirichlet inverse of A355823, characteristic function of exponentially 2^n-numbers. | [
"1",
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]
| [
"sign",
"mult"
]
| 11 | 1 | 16 | [
"A138302",
"A355823",
"A355824",
"A355826"
]
| null | Antti Karttunen, Jul 19 2022 | 2022-07-20T08:50:20 | oeisdata/seq/A355/A355824.seq | 09124334b4058b5b47346ae206c2eaad |
A355825 | a(n) = 1 if all exponents in prime factorization of n have an odd binary weight, otherwise 0. | [
"1",
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"1",
"1",
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"0",
"1",
"1",
"1"
]
| [
"nonn",
"easy",
"mult"
]
| 18 | 1 | null | [
"A000069",
"A010060",
"A268385",
"A270419",
"A270428",
"A295316",
"A302777",
"A355823",
"A355825",
"A355826"
]
| null | Antti Karttunen, Jul 19 2022 | 2023-10-28T03:45:47 | oeisdata/seq/A355/A355825.seq | 34f55d2bd4b674b599b8125376439240 |
A355826 | Dirichlet inverse of A355825, characteristic function of exponentially odious numbers. | [
"1",
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"1",
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]
| [
"sign",
"mult"
]
| 12 | 1 | 16 | [
"A270428",
"A355819",
"A355824",
"A355825",
"A355826"
]
| null | Antti Karttunen, Jul 19 2022 | 2022-07-20T08:50:30 | oeisdata/seq/A355/A355826.seq | bdab77f16f2aaf63b2356cdcbf0e7923 |
A355827 | a(1) = 1, and for n > 1, a(n) = -Sum_{d|n, d<n} A302777(n/d) * a(d). | [
"1",
"-1",
"-1",
"0",
"-1",
"2",
"-1",
"1",
"0",
"2",
"-1",
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"1",
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"-6",
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"2",
"2",
"2",
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"2",
"2",
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"-1",
"-6",
"-1",
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"-2",
"-1",
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"2"
]
| [
"sign"
]
| 16 | 1 | 6 | [
"A050376",
"A302777",
"A355817",
"A355827"
]
| null | Antti Karttunen, Jul 19 2022 | 2022-07-20T08:50:34 | oeisdata/seq/A355/A355827.seq | d36ff3ed6c910e69692866d8f259b693 |
A355828 | Dirichlet inverse of A342671, the greatest common divisor of sigma(n) and A003961(n), where A003961 is fully multiplicative with a(p) = nextprime(p). | [
"1",
"-3",
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"3",
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"30"
]
| [
"sign"
]
| 12 | 1 | 2 | [
"A000203",
"A003961",
"A342671",
"A355828",
"A355829"
]
| null | Antti Karttunen, Jul 20 2022 | 2022-07-20T18:36:10 | oeisdata/seq/A355/A355828.seq | 212440439fae702f329dd472686d01fd |
A355829 | Dirichlet inverse of A009194, the greatest common divisor of sigma(n) and n, where sigma is the sum of divisors function. | [
"1",
"-1",
"-1",
"0",
"-1",
"-4",
"-1",
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]
| [
"sign"
]
| 9 | 1 | 6 | [
"A000203",
"A009194",
"A355828",
"A355829"
]
| null | Antti Karttunen, Jul 20 2022 | 2022-07-20T18:43:34 | oeisdata/seq/A355/A355829.seq | 72a785c3e164b0a1ec5613d2d7db6717 |
A355830 | Lexicographically earliest infinite sequence such that a(i) = a(j) => A046523(i) = A046523(j) and A345000(i) = A345000(j) for all i, j >= 1. | [
"1",
"2",
"2",
"3",
"2",
"4",
"2",
"5",
"6",
"4",
"2",
"7",
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"36",
"20",
"37",
"2",
"38",
"2",
"18",
"14"
]
| [
"nonn"
]
| 8 | 1 | 2 | [
"A003415",
"A046523",
"A276086",
"A345000",
"A351235",
"A355000",
"A355830",
"A355831",
"A355832",
"A355836"
]
| null | Antti Karttunen, Jul 20 2022 | 2022-07-20T18:43:38 | oeisdata/seq/A355/A355830.seq | af2d7ed63e0fd8d9b4ef01f3de2a32e8 |
A355831 | Lexicographically earliest infinite sequence such that a(i) = a(j) => A046523(i) = A046523(j) and A354347(i) = A354347(j) for all i, j >= 1. | [
"1",
"2",
"2",
"3",
"2",
"4",
"2",
"5",
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"4",
"2",
"7",
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"41",
"21",
"42",
"2",
"43",
"2",
"44",
"45"
]
| [
"nonn"
]
| 7 | 1 | 2 | [
"A305800",
"A355830",
"A355831",
"A355832"
]
| null | Antti Karttunen, Jul 20 2022 | 2022-07-20T22:38:41 | oeisdata/seq/A355/A355831.seq | 254f41f7a2a2a1f1f1162673fcf1548c |
A355832 | Lexicographically earliest infinite sequence such that a(i) = a(j) => A354347(i) = A354347(j) for all i, j >= 1. | [
"1",
"2",
"2",
"2",
"2",
"1",
"2",
"2",
"3",
"1",
"2",
"1",
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"3",
"25",
"2",
"1",
"2",
"26",
"26"
]
| [
"nonn"
]
| 9 | 1 | 2 | [
"A003415",
"A276086",
"A345000",
"A354347",
"A355831",
"A355832"
]
| null | Antti Karttunen, Jul 19 2022 | 2022-07-20T15:59:10 | oeisdata/seq/A355/A355832.seq | 86fe115d09a851cde0bcbf6c5365e187 |
A355833 | Lexicographically earliest infinite sequence such that a(i) = a(j) => A342671(i) = A342671(j) and A348717(i) = A348717(j) for all i, j >= 1. | [
"1",
"2",
"3",
"4",
"3",
"5",
"3",
"6",
"4",
"7",
"3",
"8",
"3",
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"60",
"61",
"62",
"33",
"63",
"3",
"64",
"65",
"66"
]
| [
"nonn"
]
| 19 | 1 | 2 | [
"A000203",
"A003961",
"A246278",
"A305801",
"A305897",
"A342671",
"A348717",
"A349165",
"A349166",
"A355833",
"A355834",
"A355835",
"A355924"
]
| null | Antti Karttunen, Jul 20 2022 | 2022-07-23T10:12:17 | oeisdata/seq/A355/A355833.seq | c5187313ab7e7958e2163303e8c2cf8b |
A355834 | Lexicographically earliest infinite sequence such that a(i) = a(j) => A348717(i) = A348717(j) and A355931(i) = A355931(j) for all i, j >= 1. | [
"1",
"2",
"2",
"3",
"2",
"4",
"2",
"5",
"3",
"6",
"2",
"7",
"2",
"8",
"4",
"9",
"2",
"10",
"2",
"11",
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"2",
"59",
"60",
"61",
"2",
"62",
"2",
"63",
"16"
]
| [
"nonn"
]
| 15 | 1 | 2 | [
"A000203",
"A000265",
"A009194",
"A246278",
"A300230",
"A305800",
"A305897",
"A348717",
"A355833",
"A355834",
"A355931"
]
| null | Antti Karttunen, Jul 20 2022 | 2022-07-23T09:55:35 | oeisdata/seq/A355/A355834.seq | a4094bbf5b354906d9cbde9511e712d4 |
A355835 | Lexicographically earliest infinite sequence such that a(i) = a(j) => A348717(i) = A348717(j) and A355442(i) = A355442(j) for all i, j >= 1. | [
"1",
"2",
"3",
"4",
"3",
"5",
"3",
"6",
"7",
"8",
"3",
"9",
"3",
"10",
"5",
"11",
"3",
"12",
"3",
"13",
"14",
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"3",
"16",
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"66",
"67",
"68",
"69",
"70",
"71",
"72",
"3",
"73",
"74"
]
| [
"nonn"
]
| 17 | 1 | 2 | [
"A003961",
"A246278",
"A276086",
"A305801",
"A348717",
"A355442",
"A355821",
"A355822",
"A355833",
"A355834",
"A355835",
"A355926"
]
| null | Antti Karttunen, Jul 20 2022 | 2022-07-28T09:17:52 | oeisdata/seq/A355/A355835.seq | 21d07fe3b023e9692fa571e2bb43bd3b |
A355836 | Lexicographically earliest infinite sequence such that a(i) = a(j) => A046523(i) = A046523(j) and A355442(i) = A355442(j) for all i, j >= 1. | [
"1",
"2",
"3",
"4",
"3",
"5",
"3",
"6",
"7",
"8",
"3",
"9",
"3",
"8",
"5",
"10",
"3",
"11",
"3",
"12",
"5",
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"3",
"13",
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"3",
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"20",
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"3",
"12",
"5",
"32",
"3",
"33",
"3",
"8",
"34",
"16",
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"23",
"3",
"35",
"36",
"8",
"3",
"37",
"20",
"8",
"5",
"38",
"3",
"29",
"19",
"12",
"19",
"8",
"20",
"39",
"3",
"12",
"9",
"40",
"3",
"23",
"3",
"28",
"41"
]
| [
"nonn"
]
| 16 | 1 | 2 | [
"A000079",
"A003961",
"A006881",
"A046523",
"A101296",
"A246547",
"A276086",
"A355000",
"A355442",
"A355822",
"A355830",
"A355835",
"A355836"
]
| null | Antti Karttunen, Jul 20 2022 | 2022-07-28T09:18:37 | oeisdata/seq/A355/A355836.seq | 0703e8488b4a9ee90d8301a3b3543d02 |
A355837 | Dirichlet inverse of A322327. | [
"1",
"-2",
"-2",
"0",
"-2",
"4",
"-2",
"2",
"0",
"4",
"-2",
"0",
"-2",
"4",
"4",
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"0",
"4",
"0",
"4",
"4",
"4",
"4"
]
| [
"sign",
"mult",
"changed"
]
| 19 | 1 | 2 | [
"A322327",
"A355837"
]
| null | Antti Karttunen, Jul 19 2022, based on Werner Schulte's comment in A322327 | 2025-07-09T04:59:30 | oeisdata/seq/A355/A355837.seq | 94299fbac1ac86c82f5a945bb78b9cb6 |
A355838 | Number of regions formed in a square by straight line segments when connecting the n+1 points along each edge that divide it into n equal parts to the n+1 points on the edge on the opposite side of the square. | [
"4",
"40",
"184",
"496",
"1240",
"2144",
"4380",
"6720",
"10860",
"15528",
"24300",
"30152",
"46036",
"57496",
"75056",
"96416",
"129052",
"148512",
"198392",
"225240",
"279576",
"336272",
"415988",
"453376",
"565052",
"648008",
"754808",
"848664",
"1026040",
"1085536",
"1331532",
"1452704",
"1652684",
"1862600",
"2084888",
"2247568",
"2662092",
"2887944",
"3193744"
]
| [
"nonn"
]
| 12 | 1 | 1 | [
"A290131",
"A331452",
"A335678",
"A355798",
"A355838",
"A355839",
"A355840",
"A355841"
]
| null | Scott R. Shannon, Jul 18 2022 | 2022-07-20T10:11:28 | oeisdata/seq/A355/A355838.seq | 3504763d19cf33c7e399590b63c63c49 |
A355839 | Number of vertices formed in a square by straight line segments when connecting the n+1 points along each edge that divide it into n equal parts to the n+1 points on the edge on the opposite side of the square. | [
"5",
"25",
"133",
"357",
"1013",
"1637",
"3761",
"5561",
"9313",
"13065",
"21689",
"25357",
"41553",
"50157",
"66005",
"84897",
"117793",
"129841",
"181717",
"198857",
"251189",
"302293",
"383161",
"401073",
"517193",
"587041",
"687765",
"763425",
"949869",
"966249",
"1234425",
"1320913",
"1512233",
"1703657",
"1912765",
"2023569",
"2475361",
"2649813",
"2934997"
]
| [
"nonn"
]
| 10 | 1 | 1 | [
"A290131",
"A331452",
"A335678",
"A355799",
"A355838",
"A355839",
"A355840",
"A355841"
]
| null | Scott R. Shannon, Jul 18 2022 | 2022-07-20T10:11:22 | oeisdata/seq/A355/A355839.seq | 7a11d41dc2a28740777644a80d5c0d5d |
A355840 | Number of edges formed in a square by straight line segments when connecting the n+1 points along each edge that divide it into n equal parts to the n+1 points on the edge on the opposite side of the square. | [
"8",
"64",
"316",
"852",
"2252",
"3780",
"8140",
"12280",
"20172",
"28592",
"45988",
"55508",
"87588",
"107652",
"141060",
"181312",
"246844",
"278352",
"380108",
"424096",
"530764",
"638564",
"799148",
"854448",
"1082244",
"1235048",
"1442572",
"1612088",
"1975908",
"2051784",
"2565956",
"2773616",
"3164916",
"3566256",
"3997652",
"4271136",
"5137452",
"5537756"
]
| [
"nonn"
]
| 8 | 1 | 1 | [
"A290131",
"A331452",
"A335678",
"A355800",
"A355838",
"A355839",
"A355840",
"A355841"
]
| null | Scott R. Shannon, Jul 18 2022 | 2022-07-20T10:11:16 | oeisdata/seq/A355/A355840.seq | c7a53a8d56f807928e0789af8ceac071 |
A355841 | Irregular table read by rows: T(n,k) is the number of k-sided polygons formed, for k>=3, in a square when straight line segments connect the n+1 points along each edge that divide it into n equal parts to the n+1 points on the edge on the opposite side of the square. | [
"4",
"40",
"128",
"44",
"12",
"320",
"152",
"24",
"616",
"512",
"84",
"28",
"1240",
"744",
"120",
"40",
"1936",
"1928",
"372",
"136",
"8",
"3288",
"2656",
"616",
"160",
"4960",
"4500",
"1020",
"332",
"48",
"7224",
"6472",
"1424",
"392",
"16",
"9760",
"11064",
"2564",
"824",
"72",
"16",
"14144",
"12424",
"2696",
"856",
"32",
"18312",
"20604",
"5308",
"1468",
"328",
"16",
"24384",
"25392",
"5968",
"1584",
"160",
"8"
]
| [
"nonn",
"tabf"
]
| 13 | 1 | 1 | [
"A290131",
"A331452",
"A335678",
"A355801",
"A355838",
"A355839",
"A355840",
"A355841"
]
| null | Scott R. Shannon, Jul 18 2022 | 2024-01-04T14:13:03 | oeisdata/seq/A355/A355841.seq | 537581f1f5a70c830ffa5a72034d7fb1 |
A355842 | E.g.f. satisfies A(x) = 1/(1 - x)^(x * A(x)). | [
"1",
"0",
"2",
"3",
"44",
"210",
"3054",
"27300",
"449952",
"6020784",
"115381080",
"2053568880",
"45733246536",
"1010390340960",
"25916586868704",
"680621684914080",
"19881379012231680",
"603034125051738240",
"19833651290982164544",
"680927283288289169280",
"24953207662252739030400"
]
| [
"nonn"
]
| 27 | 0 | 3 | [
"A052813",
"A184949",
"A355779",
"A355842"
]
| null | Seiichi Manyama, Jul 18 2022 | 2022-08-28T04:24:22 | oeisdata/seq/A355/A355842.seq | c581cab2cc4a9aa232fe93ed8b3beff7 |
A355843 | E.g.f. satisfies log(A(x)) = x * (exp(x) - 1) * A(x). | [
"1",
"0",
"2",
"3",
"40",
"185",
"2556",
"22057",
"349616",
"4519377",
"83642860",
"1439639201",
"31015493928",
"663158322697",
"16468280168900",
"418772642545545",
"11847925722273376",
"348085509493265825",
"11091199095506163420",
"368912674236287743633",
"13099432280183074041560"
]
| [
"nonn"
]
| 26 | 0 | 3 | [
"A052880",
"A355781",
"A355843",
"A356785"
]
| null | Seiichi Manyama, Jul 18 2022 | 2024-03-04T04:28:47 | oeisdata/seq/A355/A355843.seq | 4b403f5183df78542cf9be1ab209adf6 |
A355844 | a(n) is the number of different self-avoiding (n-1)-move routes for a king on an empty n X n chessboard. | [
"1",
"12",
"160",
"1764",
"17280",
"156484",
"1335984",
"10899404",
"85743256",
"654854660",
"4880419048",
"35632524244",
"255652444992",
"1806891645852",
"12605286082848",
"86939096972284",
"593610191062680",
"4016965725987052",
"26965990393104248"
]
| [
"nonn",
"walk",
"more"
]
| 17 | 1 | 2 | [
"A323561",
"A323562",
"A355127",
"A355844"
]
| null | Frank Hollstein, Jul 18 2022 | 2022-09-28T01:24:08 | oeisdata/seq/A355/A355844.seq | 399b9f410cfc0e331d1ab189a66500db |
A355845 | First of three consecutive primes p,q,r such that p*r - q^2 + q*r is prime. | [
"3",
"5",
"7",
"11",
"13",
"17",
"29",
"41",
"71",
"79",
"89",
"97",
"107",
"137",
"163",
"167",
"179",
"223",
"241",
"311",
"313",
"347",
"379",
"479",
"487",
"503",
"547",
"569",
"587",
"659",
"691",
"701",
"821",
"857",
"863",
"883",
"907",
"929",
"983",
"1009",
"1109",
"1117",
"1153",
"1163",
"1171",
"1217",
"1429",
"1453",
"1483",
"1493",
"1523",
"1549",
"1583",
"1637",
"1693",
"1753",
"1783",
"1823"
]
| [
"nonn"
]
| 13 | 1 | 1 | null | null | J. M. Bergot and Robert Israel, Jul 18 2022 | 2022-07-21T07:45:47 | oeisdata/seq/A355/A355845.seq | 9c21d107ebdbaaafd1dd9e9d2ef929ff |
A355846 | a(n) = A066653(n+1)/3. | [
"1",
"2",
"5",
"7",
"10",
"17",
"23",
"38",
"47",
"58",
"70",
"77",
"95",
"103",
"107",
"110",
"137",
"143",
"170",
"182",
"205",
"215",
"217",
"238",
"247",
"278",
"283",
"287",
"298",
"313",
"322",
"347",
"355",
"373",
"385",
"397",
"443",
"455",
"467",
"542",
"562",
"565",
"577",
"590",
"593",
"653",
"655",
"667",
"670",
"682",
"703",
"707",
"710",
"737",
"758",
"773",
"787",
"835",
"907"
]
| [
"nonn"
]
| 14 | 1 | 2 | [
"A066653",
"A355846"
]
| null | Wesley Ivan Hurt, Jul 18 2022 | 2022-12-24T21:36:02 | oeisdata/seq/A355/A355846.seq | f29ac07c5e2c871ac399547909ac44de |
A355847 | Irregular table read by rows, in which the rows list integers formed in the process in A180301, but generalized to other starting integers. A row ends when reaching a term in A180301. | [
"1",
"2",
"3",
"12",
"20",
"21",
"22",
"200",
"4",
"6",
"10",
"12",
"20",
"21",
"22",
"200",
"5",
"6",
"10",
"12",
"20",
"21",
"22",
"200",
"6",
"10",
"12",
"20",
"21",
"22",
"200",
"7",
"10",
"12",
"20",
"21",
"22",
"200",
"8",
"9",
"10",
"12",
"20",
"21",
"22",
"200",
"9",
"10",
"12",
"20",
"21",
"22",
"200",
"10",
"12",
"20",
"21",
"22",
"200"
]
| [
"nonn",
"tabf",
"word"
]
| 14 | 1 | 2 | null | null | Paul Duckett, Jul 18 2022 | 2022-10-01T00:38:39 | oeisdata/seq/A355/A355847.seq | 5498df74dcaeeda153eca99e0d669169 |
A355848 | Irregular triangle read by rows in which row n lists the numbers whose divisors have arithmetic mean n, or 0 if no such number exists. | [
"1",
"3",
"5",
"6",
"7",
"0",
"11",
"14",
"15",
"13",
"20",
"21",
"17",
"22",
"30",
"19",
"27",
"0",
"23",
"33",
"35",
"42",
"45",
"39",
"44",
"60",
"29",
"38",
"54",
"56",
"31",
"0",
"46",
"51",
"55",
"66",
"70",
"37",
"49",
"57",
"41",
"65",
"68",
"78",
"96",
"43",
"0",
"47",
"62",
"69",
"77",
"105",
"0",
"99",
"126",
"53",
"85",
"102",
"110",
"91",
"92",
"132",
"140",
"0",
"59",
"87",
"95",
"114",
"135",
"168"
]
| [
"nonn",
"tabf"
]
| 27 | 1 | 2 | [
"A000005",
"A000203",
"A003601",
"A157847",
"A162538",
"A324990",
"A324991",
"A355848"
]
| null | Mohammed Yaseen, Jul 20 2022 | 2022-09-15T09:19:59 | oeisdata/seq/A355/A355848.seq | 0a57dc24af6e65caf1316b5f1e0493a2 |
A355849 | a(n) is the least k > 1 such that k*n is the average of two consecutive primes. | [
"4",
"2",
"2",
"3",
"3",
"2",
"3",
"7",
"2",
"3",
"9",
"5",
"2",
"3",
"2",
"4",
"2",
"4",
"4",
"3",
"2",
"7",
"3",
"3",
"2",
"10",
"3",
"2",
"12",
"2",
"3",
"2",
"3",
"3",
"3",
"2",
"3",
"2",
"5",
"3",
"5",
"10",
"2",
"4",
"4",
"3",
"6",
"3",
"9",
"3",
"2",
"5",
"12",
"2",
"3",
"10",
"4",
"6",
"4",
"2",
"10",
"3",
"5",
"3",
"3",
"3",
"2",
"8",
"2",
"6",
"6",
"2",
"10",
"5",
"2",
"3",
"2",
"4",
"14",
"2",
"4",
"3",
"9",
"5",
"2",
"12",
"4",
"2",
"4",
"2",
"12",
"6",
"2",
"3",
"6",
"2"
]
| [
"nonn"
]
| 25 | 1 | 1 | [
"A024675",
"A355849"
]
| null | J. M. Bergot and Robert Israel, Jul 28 2022 | 2022-08-14T10:20:23 | oeisdata/seq/A355/A355849.seq | 481a33fa0e3c2453dec31d5fc4bed12b |
A355850 | Number of monotonic lattice paths of length n which do not pass above the line y = x/(log_2(3)-1). | [
"1",
"1",
"2",
"3",
"6",
"12",
"22",
"44",
"88",
"169",
"338",
"646",
"1292",
"2584",
"5055",
"10110",
"20220",
"39915",
"79830",
"157008",
"314016",
"628032",
"1244631",
"2489262",
"4978524",
"9899008",
"19798016",
"39596032",
"78879609",
"157759218",
"313777086",
"627554172",
"1255108344",
"2502016784",
"5004033568",
"10008067136",
"19971766007"
]
| [
"nonn"
]
| 32 | 0 | 3 | [
"A001405",
"A020857",
"A126042",
"A355850"
]
| null | C. Krishna, Jul 18 2022 | 2022-09-14T10:23:53 | oeisdata/seq/A355/A355850.seq | 401815383b6c518d9841995d3fbc4b83 |
A355851 | The difference between the indices of the two most recent instances of a(n-1), not including a(n-1) itself, or 0 if not enough such instances exist. | [
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"2",
"0",
"2",
"0",
"2",
"2",
"2",
"1",
"2",
"1",
"9",
"0",
"2",
"2",
"4",
"0",
"8",
"0",
"4",
"0",
"2",
"1",
"2",
"7",
"0",
"2",
"2",
"3",
"0",
"5",
"0",
"4",
"4",
"13",
"0",
"2",
"1",
"12",
"0",
"4",
"1",
"15",
"0",
"4",
"7",
"0",
"4",
"4",
"3",
"0",
"3",
"21",
"0",
"4",
"1",
"4",
"6",
"0",
"3",
"2",
"9",
"0",
"5",
"0",
"4",
"2",
"24",
"0",
"2",
"6",
"0",
"4",
"9",
"50",
"0",
"3",
"8",
"0",
"4",
"7",
"21",
"0",
"3",
"17"
]
| [
"nonn"
]
| 16 | 1 | 8 | [
"A181391",
"A355851"
]
| null | Eric Fox, Jul 19 2022 | 2022-07-20T22:37:34 | oeisdata/seq/A355/A355851.seq | 077ca23d50cb00b488b2579008db100d |
A355852 | Numbers that can be written as the product of two of its divisors such that the binary value of the number has the same length as the concatenation of the binary values of the divisors and differs by only one bit from the divisor concatenation. | [
"39",
"78",
"87",
"156",
"174",
"183",
"312",
"348",
"366",
"375",
"399",
"539",
"624",
"696",
"732",
"750",
"759",
"798",
"847",
"1053",
"1078",
"1248",
"1392",
"1464",
"1500",
"1518",
"1527",
"1596",
"1694",
"1743",
"2106",
"2156",
"2496",
"2784",
"2928",
"3000",
"3036",
"3054",
"3063",
"3192",
"3388",
"3486",
"3535",
"3615",
"4212",
"4312",
"4381",
"4992",
"5175",
"5568",
"5856",
"6000"
]
| [
"nonn"
]
| 36 | 1 | 1 | [
"A027750",
"A030190",
"A210959",
"A355852",
"A355857"
]
| null | Scott R. Shannon and Michael De Vlieger, Jul 19 2022 | 2022-07-26T12:51:06 | oeisdata/seq/A355/A355852.seq | d3c91d60dfd6a757db25ccd10f379a4e |
A355853 | Primes in A333369. | [
"3",
"5",
"7",
"13",
"17",
"19",
"31",
"37",
"53",
"59",
"71",
"73",
"79",
"97",
"137",
"139",
"157",
"173",
"179",
"193",
"197",
"223",
"227",
"229",
"317",
"359",
"379",
"397",
"443",
"449",
"571",
"593",
"661",
"719",
"739",
"751",
"881",
"883",
"887",
"937",
"953",
"971",
"1009",
"1117",
"1151",
"1171",
"1223",
"1229",
"1447",
"1511",
"1579",
"1597",
"1663",
"1667",
"1669"
]
| [
"nonn",
"base"
]
| 31 | 1 | 1 | [
"A000040",
"A002385",
"A004023",
"A155045",
"A333369",
"A355773",
"A355853"
]
| null | Bernard Schott, Jul 19 2022 | 2022-07-30T12:38:25 | oeisdata/seq/A355/A355853.seq | 8783b5412f6ffe1b534b4922766b41f3 |
A355854 | Numbers of the form (ab+cd)*(ad+bc) with integers a,b,c,d >= 1. | [
"4",
"9",
"16",
"20",
"25",
"35",
"36",
"49",
"54",
"56",
"60",
"64",
"77",
"80",
"81",
"91",
"99",
"100",
"104",
"108",
"110",
"121",
"128",
"135",
"136",
"140",
"143",
"144",
"154",
"156",
"169",
"170",
"171",
"176",
"180",
"182",
"187",
"189",
"195",
"196",
"209",
"216",
"220",
"221",
"224",
"225",
"240",
"250",
"252",
"256",
"260",
"266",
"270",
"272",
"275",
"286",
"289"
]
| [
"nonn"
]
| 44 | 1 | 1 | [
"A000290",
"A355854"
]
| null | Thomas Kerscher, Jul 30 2022 | 2022-07-31T19:53:27 | oeisdata/seq/A355/A355854.seq | 8f70463d961e592a2eea04597d71d742 |
A355855 | A family of triangles T(m), m > 0, read by triangles and then by rows; triangle T(1) is [1; 1, 1]; for m > 0, triangle T(m+1) is obtained by replacing each subtriangle [t; u, v] in T(m) by [t; t+u, t+v; u, u+v, v]. | [
"1",
"1",
"1",
"1",
"2",
"2",
"1",
"2",
"1",
"1",
"3",
"3",
"2",
"4",
"2",
"3",
"4",
"4",
"3",
"1",
"3",
"2",
"3",
"1",
"1",
"4",
"4",
"3",
"6",
"3",
"5",
"7",
"7",
"5",
"2",
"6",
"4",
"6",
"2",
"5",
"6",
"8",
"8",
"6",
"5",
"3",
"7",
"4",
"8",
"4",
"7",
"3",
"4",
"6",
"7",
"6",
"6",
"7",
"6",
"4",
"1",
"4",
"3",
"5",
"2",
"5",
"3",
"4",
"1",
"1",
"5",
"5",
"4",
"8",
"4",
"7",
"10",
"10",
"7",
"3",
"9",
"6",
"9",
"3",
"8",
"10",
"13",
"13",
"10",
"8"
]
| [
"nonn",
"easy",
"tabf"
]
| 24 | 1 | 5 | [
"A049456",
"A355855"
]
| null | Rémy Sigrist, Jul 19 2022 | 2023-01-18T14:52:14 | oeisdata/seq/A355/A355855.seq | ab0b142d24cbae1557fe43f418695480 |
A355856 | Primes, with at least one prime digit, that remain primes when all of their prime digits are removed. | [
"113",
"131",
"139",
"151",
"179",
"193",
"197",
"211",
"241",
"311",
"389",
"421",
"431",
"541",
"613",
"617",
"631",
"719",
"761",
"829",
"839",
"859",
"1013",
"1021",
"1031",
"1039",
"1051",
"1093",
"1097",
"1123",
"1153",
"1201",
"1213",
"1217",
"1229",
"1231",
"1249",
"1259",
"1279",
"1291",
"1297",
"1301",
"1321",
"1381",
"1399",
"1429",
"1439",
"1459",
"1493",
"1531",
"1549"
]
| [
"nonn",
"base"
]
| 42 | 1 | 1 | [
"A000040",
"A019546",
"A034844",
"A355856"
]
| null | Tamas Sandor Nagy, Jul 19 2022 | 2022-09-13T13:04:44 | oeisdata/seq/A355/A355856.seq | 8c091d92b0c0dc2de97c7129c05d55a3 |
A355857 | The smallest number in A355852 whose binary value shares n out of n+1 bits with the concatenation of the binary values of its divisors' product. | [
"39",
"78",
"156",
"312",
"539",
"1053",
"2106",
"4212",
"8299",
"16598",
"32889",
"65778",
"131499",
"262605",
"525210",
"1049073",
"2098146",
"4196292",
"8392584",
"16785168",
"33556449",
"67112898",
"134225465",
"268450930"
]
| [
"nonn",
"more"
]
| 15 | 5 | 1 | [
"A027750",
"A030190",
"A210959",
"A355852",
"A355857"
]
| null | Scott R. Shannon and Michael De Vlieger, Jul 19 2022 | 2022-07-26T12:51:20 | oeisdata/seq/A355/A355857.seq | 1ad4b68f3fac6db300817c762a4d7c67 |
A355858 | a(n) = n^(2*n-1) mod (2*n-1). | [
"0",
"2",
"3",
"4",
"8",
"6",
"7",
"2",
"9",
"10",
"8",
"12",
"18",
"26",
"15",
"16",
"29",
"2",
"19",
"5",
"21",
"22",
"8",
"24",
"18",
"32",
"27",
"32",
"50",
"30",
"31",
"8",
"63",
"34",
"26",
"36",
"37",
"32",
"30",
"40",
"80",
"42",
"8",
"11",
"45",
"32",
"35",
"22",
"49",
"35",
"51",
"52",
"8",
"54",
"55",
"14",
"57",
"87",
"8",
"2",
"94",
"77",
"68",
"64",
"113",
"66",
"53",
"107",
"69"
]
| [
"nonn"
]
| 48 | 1 | 2 | [
"A000040",
"A001567",
"A006254",
"A085524",
"A174166",
"A179976",
"A355858"
]
| null | Jonas Kaiser, Jul 20 2022 | 2022-08-24T10:10:06 | oeisdata/seq/A355/A355858.seq | 3d0f4f7a9d32f4ba875ccc92d76d9464 |
A355859 | Triangle read by rows: T(n,k) = (n + k)/2 if (n + k) is congruent to 0 (mod 2), otherwise T(n,k) = 0; n >= 1, k >= 1. | [
"1",
"0",
"2",
"2",
"0",
"3",
"0",
"3",
"0",
"4",
"3",
"0",
"4",
"0",
"5",
"0",
"4",
"0",
"5",
"0",
"6",
"4",
"0",
"5",
"0",
"6",
"0",
"7",
"0",
"5",
"0",
"6",
"0",
"7",
"0",
"8",
"5",
"0",
"6",
"0",
"7",
"0",
"8",
"0",
"9",
"0",
"6",
"0",
"7",
"0",
"8",
"0",
"9",
"0",
"10",
"6",
"0",
"7",
"0",
"8",
"0",
"9",
"0",
"10",
"0",
"11",
"0",
"7",
"0",
"8",
"0",
"9",
"0",
"10",
"0",
"11",
"0",
"12",
"7",
"0",
"8",
"0",
"9",
"0",
"10",
"0",
"11",
"0",
"12",
"0",
"13",
"0"
]
| [
"nonn",
"tabl"
]
| 14 | 1 | 3 | [
"A001318",
"A138099",
"A355859"
]
| null | Ctibor O. Zizka, Jul 19 2022 | 2022-07-21T03:11:02 | oeisdata/seq/A355/A355859.seq | fc67d624506a65adfac49b1ea6512031 |
A355860 | Triangle read by rows: T(n,k) = n*k/(n + k) if n+k divides n*k, otherwise T(n,k) = 0; n >= 1, k >= 1. | [
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"2",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"2",
"0",
"0",
"3",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"4",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"5",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"3",
"0",
"4",
"0",
"0",
"0",
"0",
"0",
"6",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"7"
]
| [
"nonn",
"tabl"
]
| 20 | 1 | 10 | [
"A106448",
"A355860"
]
| null | Ctibor O. Zizka, Jul 19 2022 | 2025-01-16T14:17:16 | oeisdata/seq/A355/A355860.seq | 08b0778853d75d997dd502eded08dfef |
A355861 | G.f. A(x) satisfies: 0 = Sum_{n=-oo..+oo} x^(n*(n-1)/2) * (x^n - A(x))^n. | [
"1",
"2",
"5",
"12",
"37",
"121",
"419",
"1510",
"5604",
"21261",
"82110",
"321662",
"1275077",
"5104886",
"20611814",
"83834609",
"343164051",
"1412600336",
"5843868040",
"24283650452",
"101312783192",
"424212909937",
"1782086178267",
"7508852850710",
"31725558330499",
"134381573170076",
"570532128884181"
]
| [
"nonn"
]
| 12 | 0 | 2 | null | null | Paul D. Hanna, Jul 22 2022 | 2022-07-28T08:19:57 | oeisdata/seq/A355/A355861.seq | 1ecdfa89b9985d4f1e4b13020f941f58 |
A355862 | G.f. A(x) satisfies: 0 = Sum_{n=-oo..+oo} x^(n*(n+1)/2) * (x^n - 2*A(x))^(n+1). | [
"1",
"2",
"6",
"25",
"112",
"557",
"2914",
"15837",
"88531",
"505581",
"2936676",
"17294352",
"103018292",
"619595991",
"3757342674",
"22948207189",
"141033508661",
"871527612640",
"5412015056754",
"33754524947592",
"211353845133650",
"1328099943458743",
"8372466442163468",
"52936608451071755"
]
| [
"nonn"
]
| 9 | 0 | 2 | null | null | Paul D. Hanna, Jul 22 2022 | 2022-07-30T15:38:12 | oeisdata/seq/A355/A355862.seq | 9b7c3ee55216e45f647662990b8851c2 |
A355863 | G.f. A(x) satisfies: 0 = Sum_{n=-oo..+oo} x^(n^2) * (x^n - A(x))^(n+1). | [
"1",
"2",
"2",
"5",
"13",
"34",
"100",
"310",
"973",
"3124",
"10251",
"34086",
"114610",
"389205",
"1332788",
"4596587",
"15952281",
"55667566",
"195209636",
"687535017",
"2431044066",
"8626448629",
"30709429207",
"109645265403",
"392536229012",
"1408793986056",
"5067691347863",
"18268127956618",
"65983199912542"
]
| [
"nonn"
]
| 4 | 0 | 2 | null | null | Paul D. Hanna, Jul 22 2022 | 2022-07-24T01:45:48 | oeisdata/seq/A355/A355863.seq | bc153871cf45f25bc9f975a09f0be9ae |
A355864 | G.f.: Sum_{n=-oo..+oo} x^(n*(n+1)/2) * C(x)^(4*n-6), where C(x) = 1 + x*C(x)^2 is the g.f. of the Catalan numbers (A000108). | [
"2",
"-14",
"28",
"26",
"-203",
"427",
"-741",
"1314",
"-1575",
"264",
"3201",
"-7953",
"11308",
"-11440",
"13364",
"-26403",
"50479",
"-68549",
"59956",
"-19930",
"-50743",
"165880",
"-319635",
"436575",
"-424830",
"308193",
"-258570",
"488410",
"-1122459",
"2043162",
"-2777783",
"2771340",
"-1946892",
"726066",
"746643",
"-3157458",
"7406770"
]
| [
"sign"
]
| 12 | 0 | 1 | [
"A000108",
"A355341",
"A355345",
"A355348",
"A355864"
]
| null | Paul D. Hanna, Aug 02 2022 | 2022-08-03T06:18:43 | oeisdata/seq/A355/A355864.seq | 8b052ff5b236440e6d98b9a4004d3215 |
A355865 | Expansion of g.f. A(x) satisfying 0 = Sum_{n=-oo..+oo} x^n * (x^n - (-1)^n*2*A(x))^(2*n+1). | [
"1",
"3",
"25",
"254",
"2844",
"34031",
"426498",
"5526399",
"73433377",
"995167783",
"13701794657",
"191122323160",
"2695092314319",
"38357425655599",
"550268824751092",
"7948720164361366",
"115517358604881329",
"1687796954715824015",
"24777722054035138573",
"365305177280838473896"
]
| [
"nonn"
]
| 11 | 0 | 2 | [
"A355865",
"A355866"
]
| null | Paul D. Hanna, Aug 04 2022 | 2023-10-30T12:07:03 | oeisdata/seq/A355/A355865.seq | c915f0a4d8b18219891d4dc73d162cea |
A355866 | Expansion of g.f. A(x) satisfying 0 = Sum_{n=-oo..+oo} x^n * (x^n - A(x))^(3*n+1). | [
"1",
"2",
"5",
"20",
"77",
"319",
"1357",
"5861",
"25934",
"117970",
"554949",
"2713732",
"13801721",
"72690859",
"393319668",
"2166067444",
"12036890380",
"67038139970",
"372431798808",
"2058011292264",
"11296150608376",
"61573508814470",
"333509165576785",
"1797289086416868",
"9653137938138051"
]
| [
"nonn"
]
| 11 | 0 | 2 | [
"A355865",
"A355866",
"A366229"
]
| null | Paul D. Hanna, Aug 04 2022 | 2023-10-30T12:06:28 | oeisdata/seq/A355/A355866.seq | 622749b4385da33f3521885f8087ef56 |
A355867 | Coefficients in the even function A(x) = Sum_{n>=0} a(n)*x^(2*n) such that: 2 = Sum_{n=-oo..+oo} x^n * (x^n + i*sqrt(A(x)))^n, where i^2 = -1. | [
"1",
"1",
"-1",
"-6",
"-3",
"27",
"64",
"-72",
"-580",
"-573",
"3276",
"10778",
"-4429",
"-94493",
"-153086",
"463061",
"2197569",
"604351",
"-17222574",
"-40338277",
"64029441",
"477897865",
"433963667",
"-3248816635",
"-10525409672",
"6577294016",
"106318417880",
"163863253517",
"-599970596239",
"-2714863450622"
]
| [
"sign"
]
| 9 | 0 | 4 | [
"A355867",
"A355868"
]
| null | Paul D. Hanna, Aug 09 2022 | 2022-08-11T19:26:40 | oeisdata/seq/A355/A355867.seq | 81bebfd06a28267682adabab30f34939 |
A355868 | G.f. A(x) satisfies: 1 = Sum_{n=-oo..+oo} (x^n - 2*x*A(x))^n. | [
"1",
"2",
"3",
"3",
"5",
"39",
"206",
"697",
"1656",
"3208",
"8727",
"41667",
"192142",
"688944",
"1965643",
"5117374",
"15888133",
"63924038",
"263759291",
"955198539",
"3017571957",
"9101208987",
"30075674452",
"113177783141",
"437460265979",
"1583161667787",
"5299622270275",
"17294182815347",
"59169678008804"
]
| [
"nonn"
]
| 21 | 0 | 2 | [
"A355867",
"A355868",
"A359671",
"A359673",
"A370030",
"A370031",
"A370033",
"A370034",
"A370035",
"A370036",
"A370037",
"A370038",
"A370039",
"A370041",
"A370043"
]
| null | Paul D. Hanna, Aug 09 2022 | 2024-02-18T03:55:42 | oeisdata/seq/A355/A355868.seq | 8fcad88cacf73f590963a295e8272b1b |
A355869 | G.f. A(x) satisfies: x = Sum_{n=-oo..+oo} (-x)^n * (1 + A(x)*x^n)^n. | [
"1",
"1",
"3",
"8",
"26",
"69",
"186",
"554",
"1606",
"4772",
"14825",
"45920",
"143586",
"455561",
"1446777",
"4622609",
"14885492",
"48099814",
"156175165",
"509527438",
"1667502213",
"5475430124",
"18036181574",
"59562083008",
"197197284543",
"654439115129",
"2176448986396",
"7252784407286",
"24214655260997"
]
| [
"nonn"
]
| 6 | 0 | 3 | null | null | Paul D. Hanna, Aug 09 2022 | 2022-08-11T07:23:50 | oeisdata/seq/A355/A355869.seq | 1a9ef364e766167c641d06abe52d8937 |
A355870 | G.f. A(x,y) = Sum_{n>=0} x^n/(1-y)^(2*n+1) * Sum_{k=0..3*n} T(n,k)*y^k satisfies: y = Sum_{n=-oo..+oo} (-1)^n * x^(n*(n+1)/2) * A(x,y)^n. | [
"1",
"0",
"3",
"-3",
"1",
"0",
"9",
"-18",
"21",
"-15",
"6",
"-1",
"0",
"22",
"-56",
"116",
"-182",
"196",
"-140",
"64",
"-17",
"2",
"0",
"51",
"-144",
"496",
"-1329",
"2436",
"-3148",
"2934",
"-1971",
"934",
"-297",
"57",
"-5",
"0",
"108",
"-270",
"1680",
"-7005",
"18846",
"-36302",
"52462",
"-57914",
"49060",
"-31724",
"15412",
"-5455",
"1330",
"-200",
"14",
"0",
"221",
"-381",
"5647",
"-32760",
"116068",
"-298976",
"591690",
"-920249",
"1138052",
"-1125135",
"889253",
"-558740",
"275744",
"-104672",
"29524",
"-5833",
"721",
"-42"
]
| [
"sign",
"tabf"
]
| 6 | 0 | 3 | [
"A000108",
"A000716",
"A355350",
"A355351",
"A355352",
"A355353",
"A355354",
"A355355",
"A355356",
"A355357",
"A355360",
"A355870",
"A355871"
]
| null | Paul D. Hanna, Jul 19 2022 | 2022-07-20T08:44:39 | oeisdata/seq/A355/A355870.seq | 52087ccaa8f17f73553391cbbe48a1bf |
A355871 | G.f. A(x) satisfies: 2 = Sum_{n=-oo..+oo} x^(n*(n+1)/2) * A(x)^n. | [
"1",
"2",
"2",
"12",
"22",
"144",
"318",
"2102",
"5120",
"34274",
"88352",
"597002",
"1599676",
"10879502",
"29983958",
"204851678",
"576914820",
"3953960052",
"11329537402",
"77815428652",
"226170428918",
"1555598157856",
"4576144621100",
"31500863667990",
"93634976287220",
"644808182456240",
"1934219875423410"
]
| [
"nonn"
]
| 8 | 0 | 2 | [
"A355870",
"A355871"
]
| null | Paul D. Hanna, Jul 19 2022 | 2023-08-21T11:12:00 | oeisdata/seq/A355/A355871.seq | 8292f0a7c04e8b3a8778cf3e68f575d1 |
A355872 | G.f. A(x) satisfies: x = Sum_{n=-oo..+oo} (-x)^(n^2) * A(x)^((n-1)^2). | [
"2",
"14",
"434",
"17662",
"829314",
"42293582",
"2276970482",
"127359871870",
"7328894334338",
"431089922960910",
"25803242957983410",
"1566580082112919422",
"96239944539571023362",
"5971465584401568096846",
"373681955307631772312050",
"23556948108319423559281918",
"1494606013410312933197468930"
]
| [
"nonn"
]
| 14 | 1 | 1 | [
"A355872",
"A356500",
"A356501",
"A356502",
"A356503"
]
| null | Paul D. Hanna, Aug 09 2022 | 2024-01-18T08:03:11 | oeisdata/seq/A355/A355872.seq | 8e612a146731be4255dd9235edb836f7 |
A355873 | a(n) is the smallest positive exponent k such that the decimal expansion of n^k has at least one digit that occurs more than once. | [
"16",
"8",
"8",
"6",
"5",
"3",
"6",
"4",
"2",
"1",
"2",
"5",
"3",
"2",
"4",
"5",
"5",
"4",
"2",
"2",
"1",
"3",
"4",
"3",
"2",
"4",
"3",
"4",
"2",
"3",
"5",
"1",
"2",
"2",
"3",
"3",
"2",
"2",
"2",
"2",
"3",
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"1",
"2",
"2",
"2",
"3",
"3",
"2",
"3",
"3",
"3",
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"1",
"2",
"3",
"2",
"4",
"2",
"3",
"2",
"2",
"3",
"2",
"1",
"2",
"2",
"4",
"2",
"3",
"3",
"4",
"3",
"2",
"2",
"1",
"3",
"3",
"2",
"2",
"3",
"2",
"4",
"2",
"3",
"3",
"1",
"3",
"2",
"2",
"2",
"4",
"2",
"3",
"3",
"2",
"3",
"1",
"1",
"1"
]
| [
"nonn",
"easy",
"base"
]
| 36 | 2 | 1 | [
"A337241",
"A355873"
]
| null | Steven Haye Nicolaij, Jul 19 2022 | 2022-07-23T19:27:21 | oeisdata/seq/A355/A355873.seq | 5348480dd77797fa9d9bc53ef5db6712 |
A355874 | Expansion of e.g.f. -LambertW(x^2 * log(1-x))/2. | [
"0",
"0",
"0",
"3",
"6",
"20",
"450",
"3024",
"21840",
"449280",
"5690160",
"68579280",
"1491462720",
"27798076800",
"485405784864",
"11821894207200",
"285057334598400",
"6578025489584640",
"183420564173141760",
"5342163886869062400",
"152988752430721267200",
"4897735504358795965440"
]
| [
"nonn"
]
| 25 | 0 | 4 | [
"A052807",
"A355179",
"A355874",
"A355993",
"A357265"
]
| null | Seiichi Manyama, Sep 24 2022 | 2025-02-16T08:34:03 | oeisdata/seq/A355/A355874.seq | 77134161c082260d6add4e51d9d06acd |
A355875 | For n >= 1, k >= 1; a(n) = Sum_{k=1..n} f(n,k). f(n,k) = n*k/(n + k) if n*k divides (n+k), 0 otherwise. | [
"0",
"1",
"0",
"2",
"0",
"5",
"0",
"4",
"0",
"5",
"0",
"13",
"0",
"7",
"6",
"8",
"0",
"15",
"0",
"14",
"0",
"11",
"0",
"26",
"0",
"13",
"0",
"26",
"0",
"42",
"0",
"16",
"0",
"17",
"10",
"39",
"0",
"19",
"0",
"43",
"0",
"41",
"0",
"22",
"38",
"23",
"0",
"52",
"0",
"25",
"0",
"26",
"0",
"45",
"0",
"59",
"0",
"29",
"0",
"111",
"0",
"31",
"14",
"32",
"0",
"85",
"0",
"34",
"0",
"76",
"0",
"86",
"0",
"37",
"30",
"38"
]
| [
"nonn"
]
| 21 | 1 | 4 | [
"A005279",
"A125499",
"A244579",
"A355875"
]
| null | Ctibor O. Zizka, Jul 19 2022 | 2022-08-23T09:58:53 | oeisdata/seq/A355/A355875.seq | d97a1bcf3001455e306c85815ddadaec |
A355876 | Smallest prime p == 1 (mod 8) such that Q(sqrt(p)) has class number 2n+1. | [
"17",
"257",
"401",
"577",
"1129",
"1297",
"13033",
"11321",
"11257",
"38569",
"7057",
"23593",
"27689",
"8761",
"56857",
"284561",
"63361",
"25601",
"24337",
"55441",
"458929",
"14401",
"32401",
"78401",
"70969",
"69697",
"376897",
"106537",
"41617",
"160001",
"193601",
"57601",
"197137",
"367721",
"414433",
"1506473",
"444089",
"331777",
"156817"
]
| [
"nonn"
]
| 16 | 0 | 1 | [
"A002146",
"A002148",
"A355876",
"A355877",
"A355878"
]
| null | Jianing Song, Jul 20 2022 | 2022-07-20T08:54:12 | oeisdata/seq/A355/A355876.seq | e0aaea65a4b30f26c31c49c6ba175bc6 |
A355877 | Smallest prime p == 5 (mod 8) such that Q(sqrt(p)) has class number 2n+1. | [
"5",
"229",
"1093",
"2029",
"7573",
"12589",
"8101",
"13693",
"54541",
"18229",
"75629",
"91813",
"59053",
"65029",
"72901",
"146077",
"127453",
"199813",
"169909",
"209581",
"439573",
"189229",
"197341",
"324901",
"378229",
"596293",
"430861",
"352837",
"712981",
"1137229",
"700573",
"245029",
"574261",
"770533",
"860701",
"1432813",
"1821877",
"1092829"
]
| [
"nonn"
]
| 12 | 0 | 1 | [
"A002146",
"A002148",
"A355876",
"A355877",
"A355878"
]
| null | Jianing Song, Jul 20 2022 | 2022-07-20T08:49:12 | oeisdata/seq/A355/A355877.seq | c4b1868e7098c89435551f90253d1fce |
A355878 | Smallest p == 1 (mod 4) such that Q(sqrt(p)) has class number 2n+1. | [
"5",
"229",
"401",
"577",
"1129",
"1297",
"8101",
"11321",
"11257",
"18229",
"7057",
"23593",
"27689",
"8761",
"56857",
"146077",
"63361",
"25601",
"24337",
"55441",
"439573",
"14401",
"32401",
"78401",
"70969",
"69697",
"376897",
"106537",
"41617",
"160001",
"193601",
"57601",
"197137",
"367721",
"414433",
"1432813",
"444089",
"331777"
]
| [
"nonn"
]
| 13 | 0 | 1 | [
"A355876",
"A355877",
"A355878"
]
| null | Jianing Song, Jul 20 2022 | 2022-07-20T08:49:20 | oeisdata/seq/A355/A355878.seq | f2bccbdfa59aa23e04c44f89b4eb4b92 |
A355879 | Class number of Q(sqrt((-1)^((p-1)/2)*p)), where p = prime(n). | [
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"3",
"1",
"3",
"1",
"1",
"1",
"5",
"1",
"3",
"1",
"1",
"7",
"1",
"5",
"3",
"1",
"1",
"1",
"5",
"3",
"1",
"1",
"5",
"5",
"1",
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"1",
"7",
"1",
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"3",
"17",
"1",
"1",
"5",
"1",
"9",
"1",
"21",
"1",
"15",
"5",
"1",
"1",
"1",
"7"
]
| [
"nonn"
]
| 14 | 1 | 9 | [
"A002143",
"A002146",
"A355879"
]
| null | Jianing Song, Jul 20 2022 | 2022-07-20T15:57:43 | oeisdata/seq/A355/A355879.seq | 313729f7f8a3f6a1a274f0633a9eeef9 |
A355880 | a(n) is a maximum of t*u*v such that 2*t*u + 2*t*v + 2*u*v <= n, where t,u,v are positive integers. | [
"0",
"0",
"0",
"0",
"0",
"1",
"1",
"1",
"1",
"2",
"2",
"2",
"2",
"3",
"3",
"4",
"4",
"4",
"4",
"4",
"4",
"6",
"6",
"8",
"8",
"8",
"8",
"8",
"8",
"9",
"9",
"12",
"12",
"12",
"12",
"12",
"12",
"12",
"12",
"16",
"16",
"18",
"18",
"18",
"18",
"18",
"18",
"20",
"20",
"20",
"20",
"24",
"24",
"27",
"27",
"27",
"27",
"27",
"27",
"27",
"27",
"30",
"30",
"32",
"32",
"36",
"36",
"36",
"36",
"36",
"36",
"36",
"36",
"36",
"36",
"40"
]
| [
"nonn"
]
| 11 | 1 | 10 | [
"A008642",
"A355880"
]
| null | Gleb Ivanov, Jul 20 2022 | 2022-08-24T10:12:52 | oeisdata/seq/A355/A355880.seq | d76373d3879993f2e59782390ecdc231 |
A355881 | Table read by descending antidiagonals: T(k,n) (k >= 0, n>= 1) is number of ways to (k+2)-color a 3 X n grid ignoring the variations of two colors. | [
"1",
"1",
"2",
"1",
"9",
"3",
"1",
"41",
"49",
"4",
"1",
"187",
"801",
"169",
"5",
"1",
"853",
"13095",
"7141",
"441",
"6",
"1",
"3891",
"214083",
"301741",
"38897",
"961",
"7",
"1",
"17749",
"3499929",
"12749989",
"3430789",
"153921",
"1849",
"8",
"1",
"80963",
"57218481",
"538747549",
"302602093",
"24653151",
"488401",
"3249",
"9"
]
| [
"nonn",
"tabl"
]
| 11 | 0 | 3 | [
"A000012",
"A020698",
"A355881",
"A355882",
"A355883"
]
| null | Gerhard Kirchner, Jul 24 2022 | 2022-09-26T20:54:43 | oeisdata/seq/A355/A355881.seq | fdf193c5549a3dc1d99aff97f20ee697 |
A355882 | Number of ways to 4-color a 3 X n grid ignoring the variations of two colors. | [
"3",
"49",
"801",
"13095",
"214083",
"3499929",
"57218481",
"935434575",
"15292923363",
"250015887009",
"4087377035361",
"66822357687255",
"1092443258415843",
"17859774993929289",
"291979981913499441",
"4773425749606899135",
"78038203981259699523",
"1275805176423288314769"
]
| [
"nonn",
"easy"
]
| 18 | 1 | 1 | [
"A198710",
"A355881",
"A355882",
"A355883"
]
| null | Gerhard Kirchner, Jul 24 2022 | 2025-03-22T23:34:48 | oeisdata/seq/A355/A355882.seq | de5d7bb58988adca92203b154281917c |
A355883 | Number of ways to 5-color a 3 X n grid ignoring the variations of two colors. | [
"4",
"169",
"7141",
"301741",
"12749989",
"538747549",
"22764640981",
"961914128461",
"40645437426949",
"1717462645311229",
"72570948297479221",
"3066467006530462381",
"129572785291363217509",
"5475065165353811151709",
"231347489347123368595861",
"9775529461439509493215501"
]
| [
"nonn",
"easy"
]
| 13 | 1 | 1 | [
"A355881",
"A355882",
"A355883"
]
| null | Gerhard Kirchner, Jul 24 2022 | 2024-10-04T00:27:35 | oeisdata/seq/A355/A355883.seq | e6ee7516a58241fa973e8ec5933ed306 |
A355884 | Number of circles in an n X n grid passing through at least three points. | [
"0",
"0",
"1",
"34",
"223",
"997",
"3402",
"9141",
"21665",
"46390",
"90874",
"167539",
"293443",
"487082",
"781537",
"1209469",
"1816528",
"2661113",
"3822203",
"5369662",
"7420495",
"10086360",
"13494376"
]
| [
"nonn",
"hard",
"more"
]
| 33 | 0 | 4 | [
"A192493",
"A192494",
"A355884",
"A357301"
]
| null | Sharvil Kesarwani, Jul 20 2022 | 2022-09-24T08:17:30 | oeisdata/seq/A355/A355884.seq | ce9429befabe38b6eee644443a436e66 |
A355885 | a(n) is the smallest odd k such that k + 2^m is a de Polignac number for m = 1..n. | [
"125",
"903",
"7385",
"87453",
"957453",
"6777393",
"21487809",
"27035379",
"1379985537",
"5458529139",
"15399643917",
"32702289081"
]
| [
"nonn",
"hard",
"more"
]
| 19 | 1 | 1 | [
"A006285",
"A156695",
"A337487",
"A355885"
]
| null | Thomas Ordowski, Jul 20 2022 | 2022-10-05T04:47:25 | oeisdata/seq/A355/A355885.seq | 26066e1d4d95a657b0c9958d5ab472b4 |
A355886 | a(n) = n! * Sum_{k=1..n} floor(n/k)/k!. | [
"1",
"5",
"22",
"125",
"746",
"5677",
"44780",
"420401",
"4206970",
"47543141",
"562891352",
"7573655905",
"104684547566",
"1596368400005",
"25482043382476",
"439969180782017",
"7835163501390290",
"151712475696833221",
"3004182138648663200",
"63854641556089628801",
"1400563708969910620822"
]
| [
"nonn"
]
| 19 | 1 | 2 | [
"A006218",
"A057625",
"A355886",
"A356009",
"A356010",
"A356458",
"A356459"
]
| null | Seiichi Manyama, Jul 20 2022 | 2022-08-08T16:02:38 | oeisdata/seq/A355/A355886.seq | 61688a2e481b90069a3900bdfb4a0406 |
A355887 | a(n) = Sum_{k=1..n} k^k * floor(n/k). | [
"1",
"6",
"34",
"295",
"3421",
"50109",
"873653",
"17651130",
"405071647",
"10405074777",
"295716745389",
"9211817240589",
"312086923832843",
"11424093750214407",
"449317984131076935",
"18896062057857406028",
"846136323944194170206",
"40192544399241119212807"
]
| [
"nonn"
]
| 22 | 1 | 2 | [
"A006218",
"A024916",
"A062796",
"A064602",
"A064603",
"A064604",
"A248076",
"A319194",
"A355887"
]
| null | Seiichi Manyama, Jul 20 2022 | 2022-07-21T15:22:49 | oeisdata/seq/A355/A355887.seq | 9f53a9a4199936d8d707b2f4012fe2ab |
A355888 | a(n) = Sum_{k=1..n} k! * floor(n/k). | [
"1",
"4",
"11",
"38",
"159",
"888",
"5929",
"46276",
"409163",
"4038086",
"43954887",
"522957240",
"6749978041",
"93928274284",
"1401602642411",
"22324392570758",
"378011820666759",
"6780385526758368",
"128425485935590369",
"2561327494115859316",
"53652269665825304363",
"1177652997443472901166"
]
| [
"nonn"
]
| 15 | 1 | 2 | [
"A006218",
"A024916",
"A062363",
"A355888"
]
| null | Seiichi Manyama, Jul 20 2022 | 2022-07-21T15:26:55 | oeisdata/seq/A355/A355888.seq | 43799a127806ade4a6e22d7bfc205ee0 |
A355889 | Concatenate the exponents of the powers of 2 in A354169(k) in increasing order, for k = 1, 2, 3, ... | [
"0",
"1",
"2",
"3",
"0",
"1",
"4",
"5",
"6",
"2",
"3",
"7",
"8",
"9",
"0",
"4",
"10",
"1",
"5",
"11",
"12",
"13",
"2",
"6",
"14",
"3",
"7",
"15",
"16",
"17",
"8",
"9",
"18",
"19",
"20",
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"21",
"1",
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"22",
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"25",
"12",
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"26",
"27",
"28",
"2",
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"29",
"3",
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"30",
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"31",
"32",
"33",
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"34",
"35",
"36",
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"18",
"37",
"9",
"19",
"38",
"39",
"40",
"0",
"20",
"41",
"10",
"21",
"42",
"43",
"44",
"1",
"22",
"45",
"4",
"5",
"46"
]
| [
"nonn"
]
| 25 | 1 | 3 | [
"A354169",
"A354680",
"A354767",
"A354773",
"A354774",
"A354798",
"A355150",
"A355889"
]
| null | Rémy Sigrist and N. J. A. Sloane, Jul 20 2022 | 2022-07-21T03:05:49 | oeisdata/seq/A355/A355889.seq | ac377141d0d84504fef48aeaec544bbf |
A355890 | Let s(k) = A052551(k), and write down s(0) consecutive integers beginning with 0, skip one integer, continue with s(1) consecutive numbers, skip one integer, then s(2) consecutive numbers, skip one integer, then s(3) consecutive numbers, and so on. | [
"0",
"2",
"4",
"5",
"6",
"8",
"9",
"10",
"12",
"13",
"14",
"15",
"16",
"17",
"18",
"20",
"21",
"22",
"23",
"24",
"25",
"26",
"28",
"29",
"30",
"31",
"32",
"33",
"34",
"35",
"36",
"37",
"38",
"39",
"40",
"41",
"42",
"44",
"45",
"46",
"47",
"48",
"49",
"50",
"51",
"52",
"53",
"54",
"55",
"56",
"57",
"58",
"60",
"61",
"62",
"63",
"64",
"65",
"66",
"67",
"68",
"69",
"70",
"71",
"72",
"73",
"74",
"75",
"76",
"77",
"78",
"79",
"80",
"81",
"82",
"83",
"84",
"85",
"86",
"87",
"88",
"89",
"90"
]
| [
"nonn",
"tabf"
]
| 4 | 0 | 2 | [
"A052551",
"A355890"
]
| null | N. J. A. Sloane, Jul 25 2022 | 2022-07-25T22:27:41 | oeisdata/seq/A355/A355890.seq | 40926e4245d825ea0a3bdb3bf37fe00b |
A355891 | Numbers k such that k = ivgenpoly(A) for some composite polynomial A in F_2[x] that satisfies the condition sigma(A) = A + 1. | [
"1905",
"424321",
"438065",
"443617",
"7044945",
"7899377",
"7925761",
"26397649",
"32286449",
"38123521",
"55759233"
]
| [
"nonn",
"more"
]
| 24 | 1 | 1 | [
"A000203",
"A355891"
]
| null | Luis H. Gallardo, Jul 28 2022 | 2022-08-02T12:37:27 | oeisdata/seq/A355/A355891.seq | 8864fa70ff2bb6dddcf06f2be49724ba |
A355892 | a(n) = binary expansion of A354169(n). | [
"0",
"1",
"10",
"100",
"1000",
"11",
"10000",
"100000",
"1000000",
"1100",
"10000000",
"100000000",
"1000000000",
"10001",
"10000000000",
"100010",
"100000000000",
"1000000000000",
"10000000000000",
"1000100",
"100000000000000",
"10001000",
"1000000000000000",
"10000000000000000",
"100000000000000000",
"1100000000",
"1000000000000000000",
"10000000000000000000",
"100000000000000000000"
]
| [
"nonn"
]
| 7 | 0 | 3 | [
"A090252",
"A354169",
"A355892",
"A355893"
]
| null | N. J. A. Sloane, Aug 23 2022 | 2022-08-23T23:07:28 | oeisdata/seq/A355/A355892.seq | 369b87ce8ef3f8a76b3a79f9f24eeeea |
A355893 | Let A090252(n) = Product_{i >= 1} prime(i)^e(i); then a(n) is the concatenation, in reverse order, of e_1, e_2, ..., ending at the exponent of the largest prime factor of A090252(n); a(1)=0 by convention. | [
"0",
"1",
"10",
"100",
"2",
"1000",
"20",
"10000",
"100000",
"1000000",
"3",
"10000000",
"100000000",
"200",
"1010",
"1000000000",
"10000000000",
"100000000000",
"1000000000000",
"10000000000000",
"100000000000000",
"1000000000000000",
"4",
"10000000000000000"
]
| [
"nonn"
]
| 33 | 1 | 3 | [
"A054841",
"A090252",
"A354150",
"A354169",
"A355893"
]
| null | N. J. A. Sloane, Aug 23 2022 | 2022-08-24T12:01:47 | oeisdata/seq/A355/A355893.seq | f75fb46cfa7693e0ad35faf0901dfc72 |
A355894 | Let A354790(n) = Product_{i >= 1} prime(i)^e(i); then a(n) is the concatenation, in reverse order, of e_1, e_2, ..., ending at the exponent of the largest prime factor of A354790(n); a(1)=0 by convention. | [
"0",
"1",
"10",
"100",
"1000",
"10000",
"11",
"100000",
"1000000",
"10000000",
"100000000",
"1000000000",
"10000000000",
"1100",
"10001",
"100000000000",
"100010",
"1000000000000",
"10000000000000",
"100000000000000",
"1000000000000000",
"10000000000000000",
"100000000000000000",
"1000000000000000000",
"10000000000000000000"
]
| [
"nonn"
]
| 22 | 0 | 3 | [
"A090252",
"A354790",
"A355893",
"A355894"
]
| null | N. J. A. Sloane, Aug 25 2022 | 2022-08-26T02:44:57 | oeisdata/seq/A355/A355894.seq | 3e018270863801a8431e108ad0caee51 |
A355895 | Even terms in A354790, divided by 2, in order of appearance. | [
"1",
"3",
"11",
"7",
"17",
"41",
"37",
"83",
"79",
"109",
"241",
"239",
"499",
"491",
"1117",
"1109",
"2539",
"2531",
"5623",
"5591",
"11471",
"11467",
"23369",
"23357"
]
| [
"nonn",
"more"
]
| 14 | 1 | 2 | [
"A354790",
"A355895",
"A355896"
]
| null | N. J. A. Sloane, Aug 27 2022 | 2022-08-29T05:31:10 | oeisdata/seq/A355/A355895.seq | 72c20c67644b71838cfee502ebaca5cf |
A355896 | Multiples of 3 in A354790, divided by 3, in order of appearance. | [
"1",
"2",
"13",
"11",
"23",
"19",
"59",
"53",
"127",
"113",
"277",
"271",
"631",
"619",
"1409",
"1399",
"1823",
"3967",
"3947",
"8783",
"8779",
"18257",
"18253",
"25873"
]
| [
"nonn",
"more"
]
| 15 | 1 | 2 | [
"A354790",
"A355895",
"A355896"
]
| null | N. J. A. Sloane, Aug 27 2022 | 2022-08-29T05:31:23 | oeisdata/seq/A355/A355896.seq | 7bf9bbe8a89a66cb6af73e3204d77e7b |
A355897 | a(n) = index in A354790 of first nonprime term divisible by prime(n). | [
"7",
"7",
"14",
"14",
"15",
"17",
"29",
"64",
"71",
"79",
"119",
"120",
"127",
"223",
"239",
"260",
"287",
"288",
"319",
"320",
"447",
"484",
"511",
"512",
"519",
"960",
"967",
"968",
"969",
"1044",
"1151",
"1152",
"1155",
"1156",
"1279",
"1280",
"1283",
"1387",
"1791",
"1792",
"1919",
"1920",
"1921",
"2048",
"2051",
"2052",
"2079",
"3872",
"3875",
"3876",
"3879",
"3880",
"4095",
"4096"
]
| [
"nonn"
]
| 8 | 1 | 1 | [
"A354790",
"A354791",
"A354792",
"A355897"
]
| null | N. J. A. Sloane, Aug 28 2022 | 2022-08-28T11:39:03 | oeisdata/seq/A355/A355897.seq | d310fd7cf5dfeebc4a88209af0c67e68 |
A355898 | a(1) = a(2) = 1; a(n) = gcd(a(n-1), a(n-2)) + (a(n-1) + a(n-2))/gcd(a(n-1), a(n-2)). | [
"1",
"1",
"3",
"5",
"9",
"15",
"11",
"27",
"39",
"25",
"65",
"23",
"89",
"113",
"203",
"317",
"521",
"839",
"1361",
"2201",
"3563",
"5765",
"9329",
"15095",
"24425",
"7909",
"32335",
"40245",
"14521",
"54767",
"69289",
"124057",
"193347",
"317405",
"46443",
"363849",
"136767",
"166875",
"101217",
"89367",
"63531",
"50969",
"114501",
"165471",
"93327",
"86269",
"179597",
"265867",
"445465",
"711333"
]
| [
"nonn"
]
| 46 | 1 | 3 | [
"A005711",
"A351871",
"A355898",
"A355899"
]
| null | N. J. A. Sloane, Sep 01 2022 | 2022-11-02T07:53:56 | oeisdata/seq/A355/A355898.seq | 8618812d7000421f615fc66b47cdce4d |
A355899 | The successive gcd's arising in A355898. | [
"1",
"1",
"1",
"1",
"3",
"1",
"1",
"3",
"1",
"5",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"5",
"1",
"1",
"5",
"1",
"1",
"1",
"1",
"1",
"11",
"1",
"3",
"3",
"3",
"3",
"3",
"3",
"1",
"1",
"3",
"3",
"1",
"1",
"1",
"1",
"1",
"7",
"17",
"3",
"1",
"1",
"3",
"3",
"3",
"5",
"1",
"3",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"3",
"1",
"1",
"3",
"3",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"3",
"1",
"1",
"1",
"71",
"71",
"5",
"1",
"1",
"5",
"1",
"3",
"1",
"13",
"3",
"1",
"5",
"15",
"1",
"1",
"5"
]
| [
"nonn"
]
| 13 | 1 | 5 | [
"A351871",
"A355898",
"A355899",
"A355900",
"A355901"
]
| null | N. J. A. Sloane, Sep 03 2022 | 2022-09-03T14:04:11 | oeisdata/seq/A355/A355899.seq | 4a01c5fc7475db2e9048186a4313aa97 |
A355900 | Indices of records in A355899. | [
"1",
"5",
"10",
"33",
"51",
"84",
"107",
"849"
]
| [
"nonn",
"more"
]
| 5 | 1 | 2 | [
"A351871",
"A355898",
"A355899",
"A355900",
"A355901"
]
| null | N. J. A. Sloane, Sep 03 2022 | 2022-09-03T15:17:19 | oeisdata/seq/A355/A355900.seq | 1f0552bde26d6fd68217b5f530045830 |
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