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A359101 | a(n) = phi(5 * n)/4. | [
"1",
"1",
"2",
"2",
"5",
"2",
"6",
"4",
"6",
"5",
"10",
"4",
"12",
"6",
"10",
"8",
"16",
"6",
"18",
"10",
"12",
"10",
"22",
"8",
"25",
"12",
"18",
"12",
"28",
"10",
"30",
"16",
"20",
"16",
"30",
"12",
"36",
"18",
"24",
"20",
"40",
"12",
"42",
"20",
"30",
"22",
"46",
"16",
"42",
"25",
"32",
"24",
"52",
"18",
"50",
"24",
"36",
"28",
"58",
"20",
"60",
"30",
"36",
"32",
"60",
"20",
"66",
"32",
"44",
"30",
"70",
"24",
"72",
"36",
"50",
"36",
"60",
"24",
"78"
]
| [
"nonn",
"easy",
"mult"
]
| 21 | 1 | 3 | [
"A008653",
"A195459",
"A359100",
"A359101",
"A359102"
]
| null | Seiichi Manyama, Dec 16 2022 | 2025-02-16T08:34:04 | oeisdata/seq/A359/A359101.seq | cfa15e7cebeb29d579e7d2bf1804c9af |
A359102 | a(n) = phi(7 * n)/6. | [
"1",
"1",
"2",
"2",
"4",
"2",
"7",
"4",
"6",
"4",
"10",
"4",
"12",
"7",
"8",
"8",
"16",
"6",
"18",
"8",
"14",
"10",
"22",
"8",
"20",
"12",
"18",
"14",
"28",
"8",
"30",
"16",
"20",
"16",
"28",
"12",
"36",
"18",
"24",
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"40",
"14",
"42",
"20",
"24",
"22",
"46",
"16",
"49",
"20",
"32",
"24",
"52",
"18",
"40",
"28",
"36",
"28",
"58",
"16",
"60",
"30",
"42",
"32",
"48",
"20",
"66",
"32",
"44",
"28",
"70",
"24",
"72",
"36",
"40",
"36",
"70",
"24",
"78"
]
| [
"nonn",
"easy",
"mult"
]
| 20 | 1 | 3 | [
"A008653",
"A195459",
"A359099",
"A359101",
"A359102"
]
| null | Seiichi Manyama, Dec 16 2022 | 2025-02-16T08:34:04 | oeisdata/seq/A359/A359102.seq | 72ff33faf86e63f54b8308606a7a3e1d |
A359103 | a(n) = Sum_{d|n} d * (n/d)^d. | [
"1",
"4",
"6",
"16",
"10",
"54",
"14",
"112",
"99",
"230",
"22",
"996",
"26",
"1022",
"1620",
"3232",
"34",
"9828",
"38",
"18100",
"16380",
"22814",
"46",
"133272",
"15675",
"106886",
"179388",
"354116",
"58",
"1218150",
"62",
"1589824",
"1952676",
"2228870",
"630980",
"13767264",
"74",
"9962270",
"20732868",
"34787000",
"82",
"113676402",
"86"
]
| [
"nonn"
]
| 30 | 1 | 2 | [
"A055225",
"A087909",
"A167531",
"A359103",
"A359112",
"A359863"
]
| null | Seiichi Manyama, Dec 17 2022 | 2023-08-27T17:03:25 | oeisdata/seq/A359/A359103.seq | 7890f698566360cf88f3abe128939efa |
A359104 | Decimal expansion of the area enclosed by Sylvester's Bicorn curve. | [
"7",
"4",
"6",
"4",
"5",
"5",
"9",
"4",
"5",
"4",
"3",
"9",
"3",
"4",
"6",
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"6",
"3",
"3",
"4",
"1",
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"6",
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"3",
"8",
"3",
"3",
"1",
"3",
"9",
"0",
"9",
"0",
"8",
"9"
]
| [
"nonn",
"cons"
]
| 32 | 0 | 1 | [
"A019692",
"A122952",
"A180434",
"A197723",
"A228764",
"A359104"
]
| null | Bernard Schott, Dec 18 2022 | 2025-02-16T08:34:04 | oeisdata/seq/A359/A359104.seq | d24e8fce7cd717f736f17d6d1e8f9b19 |
A359105 | Numbers k such that each digit from 0 to 9 appears in either k^2 or k^3, but not in both. | [
"69",
"1633",
"2244",
"2303",
"3379",
"6603",
"31563"
]
| [
"nonn",
"base",
"more"
]
| 34 | 1 | 1 | [
"A029787",
"A359105"
]
| null | Alexandru Petrescu, Dec 18 2022 | 2023-01-03T02:09:53 | oeisdata/seq/A359/A359105.seq | aa35aadb3382d9cea3419151e177c541 |
A359106 | Decimal expansion of Integral_{x=0..1} ([1/x]^(-1) + {1/x}) dx, where [x] denotes the integer part of x and {x} the fractional part of x. | [
"1",
"0",
"6",
"7",
"7",
"1",
"8",
"4",
"0",
"1",
"9",
"4",
"6",
"6",
"9",
"3",
"5",
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"3",
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"0",
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"9",
"6",
"6",
"8",
"1",
"8",
"3",
"7",
"3",
"2",
"8",
"0"
]
| [
"nonn",
"cons"
]
| 9 | 1 | 3 | [
"A001620",
"A013661",
"A359106"
]
| null | Peter Luschny, Dec 16 2022 | 2022-12-17T01:45:17 | oeisdata/seq/A359/A359106.seq | 8ffa19fd36216d4c9f9d00b3b4d17e1e |
A359107 | Triangle read by rows, T(n, k) = Sum_{j=0..k} Stirling2(n, j) = Sum_{j=0..k} A048993(n, j). | [
"1",
"0",
"1",
"0",
"1",
"2",
"0",
"1",
"4",
"5",
"0",
"1",
"8",
"14",
"15",
"0",
"1",
"16",
"41",
"51",
"52",
"0",
"1",
"32",
"122",
"187",
"202",
"203",
"0",
"1",
"64",
"365",
"715",
"855",
"876",
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"0",
"1",
"128",
"1094",
"2795",
"3845",
"4111",
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"4140",
"0",
"1",
"256",
"3281",
"11051",
"18002",
"20648",
"21110",
"21146",
"21147"
]
| [
"nonn",
"tabl"
]
| 9 | 0 | 6 | [
"A000110",
"A048993",
"A102661",
"A359107",
"A359109",
"A359355"
]
| null | Peter Luschny, Dec 27 2022 | 2023-06-13T07:55:41 | oeisdata/seq/A359/A359107.seq | 5b4e9e1caac12a5ade0e48277848abe5 |
A359108 | a(n) = A128899(2*n, n) = 2*binomial(4*n - 1, 3*n) for n >= 1 and a(0) = 1. | [
"1",
"2",
"14",
"110",
"910",
"7752",
"67298",
"592020",
"5259150",
"47071640",
"423830264",
"3834669566",
"34834267234",
"317506779800",
"2902365981900",
"26597044596360",
"244263468539790",
"2247575790712824",
"20716044882791720",
"191230475831922200",
"1767658071106087160",
"16359617358545329440"
]
| [
"nonn",
"easy"
]
| 31 | 0 | 2 | [
"A005810",
"A128899",
"A224274",
"A359108"
]
| null | Peter Luschny, Dec 27 2022 | 2025-03-24T05:54:43 | oeisdata/seq/A359/A359108.seq | d2c09570ef880563ee3c4af8089d446b |
A359109 | Row sums of the accumulated Stirling2 triangle A359107. | [
"1",
"1",
"3",
"10",
"38",
"161",
"747",
"3753",
"20253",
"116642",
"713130",
"4607813",
"31345921",
"223767233",
"1671430607",
"13030153118",
"105777688842",
"892355720117",
"7808793918123",
"70763428070825",
"663061665021433",
"6415290033157950",
"64009171867651406",
"657841277082303361",
"6956340269434938161"
]
| [
"nonn"
]
| 7 | 0 | 3 | [
"A359107",
"A359109"
]
| null | Peter Luschny, Dec 27 2022 | 2022-12-28T16:47:10 | oeisdata/seq/A359/A359109.seq | 55986fa6b69013b97223bbecee7977ea |
A359110 | Number of Boolean monoids of order 2^n up to isomorphism. | [
"1",
"5",
"83",
"242547"
]
| [
"nonn",
"more"
]
| 39 | 1 | 2 | [
"A058129",
"A066534",
"A090802",
"A198085",
"A342908",
"A359110"
]
| null | Choiwah Chow, Dec 18 2022 | 2023-01-09T06:54:17 | oeisdata/seq/A359/A359110.seq | a23432ee55f571992a36f0e6281b9d16 |
A359111 | a(n) is the permanent of the n X n matrix M(n) that is defined by M[i,j] = sigma(gcd(i,j)). | [
"1",
"1",
"4",
"22",
"266",
"2218",
"58100",
"644828",
"20949776",
"502226904",
"20622109728",
"339816568512",
"29770028441472",
"568704136553760",
"31544507027061120",
"1864702918415957568",
"150882403284582339072",
"3672279699978976000896",
"458988841789031457035136",
"12369374876487501375431040"
]
| [
"nonn"
]
| 13 | 0 | 3 | [
"A000142",
"A134866",
"A359111"
]
| null | Michel Marcus, Dec 18 2022 | 2022-12-19T09:38:02 | oeisdata/seq/A359/A359111.seq | 078ca212f6d889fd9655b5f6f4f6276d |
A359112 | a(n) = Sum_{d|n} (n/d) * d^(n-d). | [
"1",
"3",
"4",
"13",
"6",
"109",
"8",
"777",
"2197",
"7541",
"12",
"374809",
"14",
"1675773",
"31954096",
"100794385",
"18",
"7391871271",
"20",
"163547770441",
"2037381161992",
"570634875581",
"24",
"1275177760626097",
"476837158203151",
"605750431288341",
"450286447756825720",
"2258377795760750777",
"30"
]
| [
"nonn"
]
| 30 | 1 | 2 | [
"A000203",
"A082245",
"A167531",
"A342628",
"A359112"
]
| null | Seiichi Manyama, Dec 17 2022 | 2023-08-27T17:03:24 | oeisdata/seq/A359/A359112.seq | a9fe9c77cdd35bb34449a3748e253966 |
A359113 | a(n) counts the bases b in the interval 2 to p = prime(n), where p if written in base b gives again a prime number in base b if all digits are written in reverse order. | [
"0",
"1",
"3",
"5",
"7",
"10",
"12",
"9",
"14",
"15",
"20",
"19",
"23",
"26",
"24",
"33",
"22",
"30",
"38",
"36",
"40",
"39",
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"128",
"97",
"119",
"99",
"118",
"139",
"105",
"96"
]
| [
"nonn",
"base"
]
| 40 | 1 | 3 | [
"A000040",
"A002385",
"A007500",
"A135551",
"A228768",
"A331486",
"A359113"
]
| null | Thomas Scheuerle, Jan 07 2023 | 2023-02-13T12:46:19 | oeisdata/seq/A359/A359113.seq | 90c20950be6c24c62eb9732f39544086 |
A359114 | a(1) = 1; for n > 1, a(n) is the smallest positive number which has not appeared that shares a factor with the sum of the first n bits of the binary Champernowne string starting from 1. | [
"1",
"2",
"4",
"3",
"6",
"5",
"10",
"15",
"8",
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"7",
"12",
"18",
"21",
"14",
"11",
"16",
"13",
"26",
"39",
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"20",
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"74",
"72",
"76",
"78",
"75",
"80",
"41",
"82",
"77",
"81",
"84",
"43",
"86"
]
| [
"nonn",
"base"
]
| 9 | 1 | 2 | [
"A027749",
"A030302",
"A030303",
"A359114",
"A359663"
]
| null | Scott R. Shannon, Dec 16 2022 | 2023-01-10T07:59:23 | oeisdata/seq/A359/A359114.seq | 0bc353886e9f66d0453132e214667869 |
A359115 | a(n) is the smallest odd prime not already in the sequence such that when the terms a(1)..a(n) are concatenated, the result is the reverse of a prime. | [
"3",
"5",
"11",
"7",
"29",
"37",
"89",
"211",
"71",
"241",
"347",
"331",
"23",
"457",
"233",
"31",
"53",
"67",
"17",
"181",
"107",
"1051",
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"421",
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"2083",
"317",
"73",
"599",
"571",
"191",
"631",
"1451"
]
| [
"nonn",
"base"
]
| 21 | 1 | 1 | [
"A000040",
"A004086",
"A359115"
]
| null | Tamas Sandor Nagy, Dec 16 2022 | 2023-01-14T14:33:28 | oeisdata/seq/A359/A359115.seq | a93c37fcc5f721fbec4f07d38945086e |
A359116 | Mark the points of the Farey series F_n on a strip of paper and wrap it around a circle of circumference 1 so the endpoints 0 and 1 coincide; draw a chord between every pair of the Farey points; a(n) is the number of vertices in the resulting graph. | [
"1",
"2",
"5",
"19",
"208",
"480",
"3011",
"7185",
"20169",
"35438",
"111232",
"162062",
"422841",
"633226",
"1024370",
"1576122",
"3315790",
"4240974",
"8204951",
"10654475",
"15310713"
]
| [
"nonn",
"more"
]
| 42 | 1 | 2 | [
"A005728",
"A006533",
"A006842",
"A006843",
"A007569",
"A007678",
"A358883",
"A359116",
"A359117",
"A359118",
"A359119"
]
| null | Scott R. Shannon and N. J. A. Sloane, Dec 16 2022 | 2023-04-22T18:18:14 | oeisdata/seq/A359/A359116.seq | aba724f026e5cc6ef5a2e381cdc07d91 |
A359117 | Number of regions in the planar Farey Ring graph FR(n) defined in A359116, including the regions between the convex hull and the bounding circle. | [
"1",
"2",
"8",
"30",
"250",
"548",
"3180",
"7468",
"20684",
"36164",
"112406",
"163600",
"425144",
"636208",
"1028934",
"1581766",
"3323182",
"4249976",
"8216442",
"10668790",
"15329216"
]
| [
"nonn",
"more"
]
| 14 | 1 | 2 | [
"A005728",
"A006842",
"A006843",
"A007678",
"A358886",
"A359116",
"A359117",
"A359118",
"A359119"
]
| null | Scott R. Shannon and N. J. A. Sloane, Dec 17 2022 | 2025-05-06T11:26:06 | oeisdata/seq/A359/A359117.seq | accb6acbca35b73db85d44a033171aee |
A359118 | Number of edges in the planar Farey Ring graph FR(n) defined in A359116, including the regions between the convex hull and the bounding circle. | [
"1",
"2",
"12",
"48",
"457",
"1027",
"6190",
"14652",
"40852",
"71601",
"223637",
"325661",
"847984",
"1269433",
"2053303",
"3157887",
"6638971",
"8490949",
"16421392",
"21323264",
"30639928"
]
| [
"nonn",
"more"
]
| 11 | 1 | 2 | [
"A005728",
"A006842",
"A006843",
"A135565",
"A358888",
"A359116",
"A359117",
"A359118",
"A359119"
]
| null | Scott R. Shannon and N. J. A. Sloane, Dec 17 2022 | 2025-05-06T11:26:17 | oeisdata/seq/A359/A359118.seq | 8e7a2036bdf65811a46c1dcad9e8e29a |
A359119 | Irregular table read by rows: T(n,k) is the number of k-gons, k>=2, in the Farey Ring graph FR(n) defined in A359116. | [
"2",
"4",
"4",
"6",
"18",
"6",
"10",
"124",
"76",
"32",
"8",
"12",
"244",
"196",
"78",
"14",
"4",
"18",
"1184",
"1296",
"534",
"118",
"28",
"2",
"22",
"2632",
"3180",
"1244",
"330",
"58",
"2",
"28",
"7244",
"8628",
"3594",
"962",
"190",
"38",
"32",
"12626",
"14922",
"6378",
"1836",
"330",
"36",
"4",
"42",
"39060",
"45656",
"20152",
"6082",
"1252",
"132",
"28",
"2",
"46",
"56980",
"66088",
"29454",
"8916",
"1840",
"244",
"26",
"6"
]
| [
"nonn",
"tabf"
]
| 12 | 2 | 1 | [
"A005728",
"A006842",
"A006843",
"A331451",
"A358889",
"A359116",
"A359117",
"A359118",
"A359119"
]
| null | Scott R. Shannon and N. J. A. Sloane, Dec 17 2022 | 2022-12-17T23:36:59 | oeisdata/seq/A359/A359119.seq | ededd8c18b15c4847fcfd900fe679f6d |
A359120 | Number of primes p with 10^(n-1) < p < 10^n such that 10^n-p is also prime. | [
"3",
"11",
"47",
"221",
"1433",
"9579",
"69044",
"519260",
"4056919",
"32504975",
"266490184",
"2224590493",
"18850792161"
]
| [
"nonn",
"more"
]
| 28 | 1 | 1 | [
"A006879",
"A065577",
"A107318",
"A358310",
"A359120"
]
| null | N. J. A. Sloane, Dec 17 2022 | 2022-12-18T08:26:21 | oeisdata/seq/A359/A359120.seq | 73aea9b1cc08b862c612f2d2e9bb43fe |
A359121 | a(n) = number of terms of A068811 that are <= n. | [
"0",
"0",
"1",
"1",
"2",
"2",
"3",
"3",
"3",
"3",
"4",
"4",
"4",
"4",
"4",
"4",
"5",
"5",
"5",
"5",
"5",
"5",
"5",
"5",
"5",
"5",
"5",
"5",
"6",
"6",
"6",
"6",
"6",
"6",
"6",
"6",
"6",
"6",
"6",
"6",
"7",
"7",
"7",
"7",
"7",
"7",
"8",
"8",
"8",
"8",
"8",
"8",
"9",
"9",
"9",
"9",
"9",
"9",
"10",
"10",
"10",
"10",
"10",
"10",
"10",
"10",
"10",
"10",
"10",
"10",
"11",
"11",
"11",
"11",
"11",
"11",
"11",
"11",
"11",
"11",
"11",
"11",
"12",
"12",
"12",
"12"
]
| [
"nonn"
]
| 7 | 1 | 5 | [
"A000720",
"A068811",
"A359121"
]
| null | N. J. A. Sloane, Dec 18 2022 | 2022-12-18T20:04:28 | oeisdata/seq/A359/A359121.seq | 70537485985e83dfec33a62b5fc27363 |
A359122 | Index of prime(n) in A068811, or -1 if prime(n) is missing from A068811. | [
"-1",
"1",
"2",
"3",
"4",
"-1",
"5",
"-1",
"-1",
"6",
"-1",
"-1",
"7",
"-1",
"8",
"9",
"10",
"-1",
"-1",
"11",
"-1",
"-1",
"12",
"13",
"14",
"-1",
"-1",
"-1",
"-1",
"15",
"-1",
"-1",
"16",
"-1",
"-1",
"-1",
"-1",
"-1",
"-1",
"17",
"18",
"-1",
"19",
"-1",
"-1",
"-1",
"-1",
"-1",
"20",
"-1",
"-1",
"21",
"-1",
"-1",
"22",
"-1",
"-1",
"-1",
"-1",
"23",
"-1",
"-1",
"-1",
"-1",
"-1",
"24",
"-1",
"-1",
"25",
"-1",
"26",
"27",
"-1"
]
| [
"sign"
]
| 17 | 1 | 3 | [
"A068811",
"A359121",
"A359122"
]
| null | N. J. A. Sloane, Dec 18 2022 | 2022-12-18T21:49:12 | oeisdata/seq/A359/A359122.seq | 8a7bccad587b2ccbe718a3652636e365 |
A359123 | First differences of A068811, halved. | [
"1",
"1",
"2",
"3",
"6",
"6",
"3",
"3",
"3",
"6",
"6",
"3",
"4",
"8",
"12",
"18",
"3",
"6",
"18",
"6",
"9",
"12",
"18",
"15",
"3",
"3",
"12",
"9",
"15",
"6",
"18",
"6",
"9",
"6",
"18",
"6",
"15",
"9",
"12",
"3",
"3",
"15",
"18",
"12",
"9",
"6",
"18",
"6",
"3",
"18",
"12",
"12",
"9",
"6",
"3",
"3",
"9",
"3",
"3",
"7",
"17",
"9",
"51",
"6",
"9",
"6",
"12",
"21",
"21",
"3",
"6",
"27",
"27",
"30",
"6",
"27",
"9",
"21",
"12",
"36",
"84",
"6"
]
| [
"nonn"
]
| 6 | 1 | 3 | [
"A068811",
"A359121",
"A359122",
"A359123"
]
| null | N. J. A. Sloane, Dec 18 2022 | 2022-12-18T21:06:29 | oeisdata/seq/A359/A359123.seq | 5eae72152bf8cf91e4bcdf47ca55218c |
A359124 | Concatenate the decimal numbers 1,2,3,...,n, then add 1. | [
"2",
"13",
"124",
"1235",
"12346",
"123457",
"1234568",
"12345679",
"123456790",
"12345678911",
"1234567891012",
"123456789101113",
"12345678910111214",
"1234567891011121315",
"123456789101112131416",
"12345678910111213141517",
"1234567891011121314151618",
"123456789101112131415161719",
"12345678910111213141516171820"
]
| [
"nonn",
"base"
]
| 12 | 1 | 1 | [
"A007908",
"A069048",
"A359124",
"A359125"
]
| null | N. J. A. Sloane, Dec 20 2022 | 2022-12-20T18:47:45 | oeisdata/seq/A359/A359124.seq | 75711e4e489bcbd773292dc1462bd95a |
A359125 | Largest prime factor of A359124(n). | [
"2",
"13",
"31",
"19",
"6173",
"123457",
"154321",
"333667",
"333667",
"3388877",
"4281283",
"2630197",
"26798700427",
"8663199947",
"2523244037",
"12873492085621702963",
"32929947197382727",
"17539959825403",
"71595329159622797",
"325339942922532262019",
"9999103057380477280607",
"17465868005034957301",
"1423364280511"
]
| [
"nonn",
"base"
]
| 9 | 1 | 1 | [
"A007908",
"A069048",
"A075032",
"A359124",
"A359125"
]
| null | N. J. A. Sloane, Dec 20 2022 | 2022-12-20T18:49:28 | oeisdata/seq/A359/A359125.seq | db0e3ebbdf453dbe9f764e6c03b17730 |
A359126 | A000168(n+1) - A000139(n). | [
"0",
"8",
"52",
"372",
"2894",
"23966",
"208086",
"1874508",
"17390158",
"165248499",
"1601857338",
"15790898316",
"157915304928",
"1598927475749",
"16365689821454",
"169113248927772",
"1762344520554606",
"18504654979649615",
"195620858324078190",
"2080695883684277190",
"22254407183551916850"
]
| [
"nonn",
"changed"
]
| 22 | 0 | 2 | [
"A000139",
"A000168",
"A359126"
]
| null | N. J. A. Sloane, Dec 23 2022, following a suggestion from Doron Zeilberger | 2025-07-09T04:59:44 | oeisdata/seq/A359/A359126.seq | a33e01e56334448876de77573e113eba |
A359127 | Oblong numbers which are products of six distinct primes. | [
"43890",
"53130",
"81510",
"108570",
"152490",
"184470",
"188790",
"260610",
"297570",
"371490",
"416670",
"475410",
"509082",
"549822",
"593670",
"637602",
"648830",
"756030",
"757770",
"814506",
"932190",
"939930",
"973182",
"1003002",
"1045506",
"1135290",
"1178310",
"1222130",
"1233210",
"1257762",
"1278030",
"1332870",
"1414910",
"1417290",
"1484742"
]
| [
"nonn"
]
| 21 | 1 | 1 | [
"A002378",
"A067885",
"A359127",
"A359304"
]
| null | Massimo Kofler, Dec 26 2022 | 2023-01-14T19:54:26 | oeisdata/seq/A359/A359127.seq | e0c231bff459eae081478567062ec818 |
A359128 | The Fibostracci sequence: a(0) = 0, a(1) = 1; thereafter a(n) = a(n-1)+a(n-2) if a(n-1) and a(n-2) do not share a digit, otherwise a(n) is the smallest number not yet in the sequence. | [
"0",
"1",
"1",
"2",
"3",
"5",
"8",
"13",
"21",
"4",
"25",
"29",
"6",
"35",
"41",
"76",
"117",
"7",
"9",
"16",
"25",
"41",
"66",
"107",
"173",
"10",
"11",
"12",
"14",
"15",
"17",
"18",
"19",
"20",
"39",
"59",
"22",
"81",
"103",
"23",
"24",
"26",
"27",
"28",
"30",
"58",
"88",
"31",
"119",
"32",
"151",
"183",
"33",
"34",
"36",
"37",
"38",
"40",
"78",
"118",
"42",
"160",
"202",
"43",
"245",
"44"
]
| [
"nonn",
"base"
]
| 31 | 0 | 4 | [
"A000045",
"A357048",
"A359128"
]
| null | Eric Angelini, Sep 30 2022 [Submitted on his behalf by N. J. A. Sloane, Dec 25 2022] | 2022-12-26T09:58:03 | oeisdata/seq/A359/A359128.seq | 3ca1cbb0040ed057eaa1b2fc2b4313b2 |
A359129 | q^12*(q^8+q^4+1)*(q^6-1)*(q^2-1) as q runs through the prime powers A000961. | [
"0",
"211341312",
"20560831566912",
"67802350642790400",
"35817806390625000000",
"450782974156649555296512",
"19045158721552047314829312",
"516964372056378442547769600",
"143027806714329275383382337600",
"15411735887347424297802263464512"
]
| [
"nonn"
]
| 13 | 1 | 2 | [
"A000961",
"A037253",
"A359129"
]
| null | N. J. A. Sloane, Dec 28 2022 | 2024-08-20T23:52:44 | oeisdata/seq/A359/A359129.seq | 22c5dff344b1132f4a34d1df8061a017 |
A359130 | F(n*(2*n+1))^2 - F(n)^2, where F(t) is the t-th Fibonacci number. | [
"0",
"3",
"3024",
"119814912",
"222915410843895",
"19483654655064681378000",
"80002189819472960546544159263232",
"15432434705952729777225206827234489126432731",
"139851826795787684110005794342883432037695905219048253888",
"59539195368390959718004621997019134942145263977350041232503934809554560"
]
| [
"nonn"
]
| 8 | 0 | 2 | [
"A000045",
"A359130"
]
| null | N. J. A. Sloane, Dec 29 2022 | 2022-12-29T15:42:33 | oeisdata/seq/A359/A359130.seq | 9b012652f3ed06ebc6ad8976441ee167 |
A359131 | Number of odd primes in the Collatz trajectory of A177000(n). | [
"0",
"2",
"1",
"5",
"4",
"2",
"3",
"6",
"5",
"6",
"2",
"10",
"8",
"9",
"7",
"8",
"6",
"11",
"9",
"4",
"7",
"5",
"8",
"3",
"9",
"7",
"4",
"2",
"3",
"6",
"9",
"7",
"10",
"5",
"8",
"6",
"11",
"4",
"2",
"10",
"3",
"9",
"10",
"11",
"12",
"3",
"6",
"5",
"11",
"4",
"10",
"5",
"3",
"6",
"7",
"9",
"7",
"2",
"7",
"5",
"8",
"6",
"4",
"7",
"5",
"8",
"3",
"6",
"9",
"10",
"5",
"8",
"3",
"7",
"8",
"8",
"13",
"11",
"11",
"9",
"12",
"2"
]
| [
"nonn",
"changed"
]
| 14 | 1 | 2 | [
"A055509",
"A078350",
"A078373",
"A177000",
"A359131"
]
| null | N. J. A. Sloane, Dec 29 2022, following a suggestion from Rudolfo Nieves | 2025-07-09T04:59:51 | oeisdata/seq/A359/A359131.seq | 24cc39f94b33a66b0b14946da9c3d7c2 |
A359132 | Least m such that the sum of the aliquot parts of m (A001065) equals n, or -1 if no such number exists. | [
"1",
"2",
"-1",
"4",
"9",
"-1",
"6",
"8",
"10",
"15",
"14",
"21",
"121",
"27",
"22",
"16",
"12",
"39",
"289",
"65",
"34",
"18",
"20",
"57",
"529",
"95",
"46",
"69",
"28",
"115",
"841",
"32",
"58",
"45",
"62",
"93",
"24",
"155",
"1369",
"217",
"44",
"63",
"30",
"50",
"82",
"123",
"52",
"129",
"2209",
"75",
"40",
"141",
"-1",
"235",
"42",
"36",
"106",
"99",
"68",
"265",
"3481",
"371",
"118",
"64",
"56",
"117",
"54"
]
| [
"sign"
]
| 10 | 0 | 2 | [
"A001065",
"A070015",
"A359132"
]
| null | N. J. A. Sloane, Jan 10 2023 | 2023-01-10T18:35:02 | oeisdata/seq/A359/A359132.seq | f4d0177b538021a259bd21b59b6425a7 |
A359133 | Sum of square end-to-end displacements over all n-step self-avoiding walks of A359741. | [
"0",
"6",
"24",
"78",
"384",
"8190",
"8472",
"178110",
"193824",
"4231662",
"7072056",
"102812142",
"208526592",
"2508914454",
"5268441144",
"62304671286",
"124116667488",
"1547651742990",
"2850706506936",
"38100453950670"
]
| [
"nonn",
"walk",
"more"
]
| 22 | 0 | 2 | [
"A001412",
"A118313",
"A359073",
"A359133",
"A359741"
]
| null | Scott R. Shannon, Jan 12 2023 | 2023-01-15T15:11:21 | oeisdata/seq/A359/A359133.seq | 0357bb1e390a536cb0113880fd522ece |
A359134 | a(n) = Sum_{d|n} (2*d)^(n/d - 1). | [
"1",
"3",
"5",
"13",
"17",
"55",
"65",
"201",
"293",
"779",
"1025",
"3365",
"4097",
"12303",
"17781",
"49681",
"65537",
"204547",
"262145",
"791549",
"1095429",
"3145751",
"4194305",
"12897625",
"16787217",
"50331675",
"68788805",
"201591509",
"268435457",
"815505231",
"1073741825",
"3223326753",
"4355433957",
"12884901923"
]
| [
"nonn"
]
| 37 | 1 | 2 | [
"A087909",
"A278741",
"A349970",
"A359134",
"A359733",
"A359796"
]
| null | Seiichi Manyama, Jan 13 2023 | 2023-08-14T01:59:16 | oeisdata/seq/A359/A359134.seq | 692c1a6a09b33626923a1dfcee0a5ca1 |
A359135 | Decimal expansion of the aliquot constant (negated). | [
"0",
"3",
"3",
"2",
"5",
"9",
"4",
"8",
"0",
"8",
"0",
"0",
"9"
]
| [
"nonn",
"cons",
"more"
]
| 36 | 0 | 2 | null | null | N. J. A. Sloane, Jan 16 2023 | 2024-04-06T20:30:51 | oeisdata/seq/A359/A359135.seq | d26801604f18e9799cc833658a275434 |
A359136 | Primes such that there is a nontrivial permutation which when applied to the digits produces a prime (Version 1). | [
"11",
"13",
"17",
"31",
"37",
"71",
"73",
"79",
"97",
"101",
"103",
"107",
"109",
"113",
"127",
"131",
"137",
"139",
"149",
"151",
"157",
"163",
"167",
"173",
"179",
"181",
"191",
"193",
"197",
"199",
"211",
"223",
"227",
"229",
"233",
"239",
"241",
"251",
"271",
"277",
"281",
"283",
"293",
"307",
"311",
"313",
"317",
"331",
"337",
"347",
"349",
"353",
"359",
"367",
"373",
"379",
"383",
"389",
"397",
"401",
"419",
"421"
]
| [
"nonn",
"base"
]
| 27 | 1 | 1 | [
"A007500",
"A055387",
"A061461",
"A069706",
"A090933",
"A225035",
"A359136",
"A359137",
"A359138",
"A359139"
]
| null | N. J. A. Sloane and Allan C. Wechsler, Jan 22 2023 | 2023-01-23T12:07:14 | oeisdata/seq/A359/A359136.seq | 5c0be55431cf365e8217722d3ddc1b99 |
A359137 | Primes such that there is a nontrivial permutation which when applied to the digits produces a prime (Version 2). | [
"11",
"13",
"17",
"31",
"37",
"71",
"73",
"79",
"97",
"101",
"107",
"113",
"127",
"131",
"137",
"139",
"149",
"151",
"157",
"163",
"167",
"173",
"179",
"181",
"191",
"193",
"197",
"199",
"211",
"223",
"227",
"229",
"233",
"239",
"241",
"251",
"271",
"277",
"281",
"283",
"293",
"311",
"313",
"317",
"331",
"337",
"347",
"349",
"353",
"359",
"367",
"373",
"379",
"383",
"389",
"397",
"419",
"421"
]
| [
"nonn",
"base"
]
| 27 | 1 | 1 | [
"A359136",
"A359137",
"A359138",
"A359139"
]
| null | N. J. A. Sloane and Allan C. Wechsler, Jan 22 2023 | 2023-01-23T12:07:20 | oeisdata/seq/A359/A359137.seq | 9c1fc45073e2f198160004bbf0a5da66 |
A359138 | A359136 together with 2, 3, 5, 7. | [
"2",
"3",
"5",
"7",
"11",
"13",
"17",
"31",
"37",
"71",
"73",
"79",
"97",
"101",
"103",
"107",
"109",
"113",
"127",
"131",
"137",
"139",
"149",
"151",
"157",
"163",
"167",
"173",
"179",
"181",
"191",
"193",
"197",
"199",
"211",
"223",
"227",
"229",
"233",
"239",
"241",
"251",
"271",
"277",
"281",
"283",
"293",
"307",
"311",
"313",
"317",
"331",
"337",
"347",
"349",
"353",
"359",
"367",
"373",
"379",
"383",
"389",
"397",
"401",
"419",
"421"
]
| [
"nonn",
"base"
]
| 18 | 1 | 1 | [
"A007500",
"A359136",
"A359137",
"A359138",
"A359139"
]
| null | N. J. A. Sloane and Allan C. Wechsler, Jan 22 2023 | 2023-01-23T08:54:22 | oeisdata/seq/A359/A359138.seq | 273b17a4a0922e4fc5258a01f24197d8 |
A359139 | A359137 together with 2, 3, 5, 7. | [
"2",
"3",
"5",
"7",
"11",
"13",
"17",
"31",
"37",
"71",
"73",
"79",
"97",
"101",
"107",
"113",
"127",
"131",
"137",
"139",
"149",
"151",
"157",
"163",
"167",
"173",
"179",
"181",
"191",
"193",
"197",
"199",
"211",
"223",
"227",
"229",
"233",
"239",
"241",
"251",
"271",
"277",
"281",
"283",
"293",
"311",
"313",
"317",
"331",
"337",
"347",
"349",
"353",
"359",
"367",
"373",
"379",
"383",
"389",
"397",
"419",
"421"
]
| [
"nonn",
"base"
]
| 20 | 1 | 1 | [
"A359136",
"A359137",
"A359138",
"A359139"
]
| null | N. J. A. Sloane and Allan C. Wechsler, Jan 22 2023 | 2023-01-23T02:34:01 | oeisdata/seq/A359/A359139.seq | c0c1317d4c3e7a6f9897891f3e0b9ed6 |
A359140 | G.f.: (1+z+z^2-sqrt(1+2*z-z^2-6*z^3-3*z^4))/(2*z^2*(1+z)). | [
"1",
"0",
"0",
"1",
"-1",
"2",
"-1",
"1",
"3",
"-5",
"13",
"-13",
"18",
"3",
"-22",
"96",
"-143",
"248",
"-178",
"75",
"576",
"-1312",
"2917",
"-3614",
"4198",
"387",
"-8271",
"28636",
"-49640",
"78665",
"-67239",
"12960",
"200435",
"-526671",
"1091169",
"-1485961",
"1577796",
"49219",
"-3759073",
"11894774",
"-22077620",
"33571263",
"-31053503",
"3078688",
"89051699",
"-249881703",
"502358137",
"-714467917"
]
| [
"sign"
]
| 7 | 0 | 6 | null | null | N. J. A. Sloane, Jan 24 2023 | 2023-01-24T14:43:44 | oeisdata/seq/A359/A359140.seq | f0dff3fb844e690a3ef517b57c477738 |
A359141 | First differences of the pancake flipping (or sorting by prefix reversal) sequence A058986. | [
"1",
"2",
"1",
"1",
"2",
"1",
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"2"
]
| [
"nonn",
"more"
]
| 6 | 1 | 2 | [
"A058986",
"A359141"
]
| null | N. J. A. Sloane, Jan 26 2023 | 2023-01-27T08:42:23 | oeisdata/seq/A359/A359141.seq | 9fd215fe3e486f72c0a18a494f19114a |
A359142 | Let s = sum of digits of n, let t = decimal concatenation of n and s, let u be obtained by deleting all copies of the leading digit of t from t, if this digit occurs in s. Then if u has only zero digits, a(n) = 0; if u has leading digit 0 but not all its digits are 0, delete all leading 0's from u and negate the result to get a(n); otherwise a(n) = u. | [
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"112",
"123",
"134",
"145",
"156",
"167",
"178",
"189",
"90",
"0",
"213",
"224",
"235",
"246",
"257",
"268",
"279",
"2810",
"2911",
"0",
"314",
"325",
"336",
"347",
"358",
"369",
"3710",
"3811",
"3912",
"0",
"415",
"426",
"437",
"448",
"459",
"4610",
"4711",
"4812",
"4913",
"0",
"516",
"527",
"538",
"549",
"5510",
"5611",
"5712",
"5813"
]
| [
"sign",
"base"
]
| 77 | 1 | 11 | [
"A359142",
"A359143",
"A359144"
]
| null | N. J. A. Sloane, Jan 31 2023, based on suggestions from Eric Angelini and Hans Havermann | 2024-12-21T17:35:46 | oeisdata/seq/A359/A359142.seq | fd7c07c4b57373a7183eadaf23f285a0 |
A359143 | The sum-and-erase sequence starting at 11: a(0) = 11; for n>=1, let m = a(n-1), and if m < 0, change m to an improper decimal "number" by replacing the minus sign by a single leading zero; then a(n) = A359142(m). | [
"11",
"112",
"1124",
"11248",
"2486",
"4860",
"486018",
"48601827",
"4860182736",
"8601827365",
"860182736546",
"86018273654656",
"8601827365465667",
"601273654656670",
"-1273545704",
"-127354570438",
"-12735457043849",
"-1273545704384962",
"1273545743849627",
"127354574384962777",
"273545743849627779"
]
| [
"sign",
"base"
]
| 87 | 0 | 1 | [
"A359142",
"A359143",
"A361350",
"A361501"
]
| null | N. J. A. Sloane, Jan 31 2023, based on suggestions from Eric Angelini and Hans Havermann | 2024-12-21T17:38:05 | oeisdata/seq/A359/A359143.seq | 343f7390401a1944a2f71260d12b7513 |
A359144 | Indices k such that A359142(k) is negative. | [
"109",
"1009",
"1018",
"1019",
"1027",
"1028",
"1029",
"1036",
"1037",
"1038",
"1039",
"1045",
"1046",
"1047",
"1048",
"1049",
"1054",
"1055",
"1056",
"1057",
"1058",
"1059",
"1063",
"1064",
"1065",
"1066",
"1067",
"1068",
"1069",
"1072",
"1073",
"1074",
"1075",
"1076",
"1077",
"1078",
"1079",
"1081",
"1082",
"1083",
"1084",
"1085",
"1086",
"1087"
]
| [
"nonn",
"base"
]
| 18 | 1 | 1 | [
"A359142",
"A359144"
]
| null | N. J. A. Sloane, based on a comment from M. F. Hasler which was formerly in A359142, Feb 01 2023 | 2023-10-11T08:42:14 | oeisdata/seq/A359/A359144.seq | b259f6296d3b89fe81f3aeb9df748cfa |
A359145 | a(n) = smallest k such that li(k) - pi(k) >= n, where li(k) is the logarithmic integral and pi(x) is the number of primes <= x. | [
"6",
"10",
"27",
"57",
"95",
"148",
"221",
"345",
"539",
"806",
"1270",
"1393",
"1407",
"1422",
"2590",
"2645",
"3292",
"4888",
"4930",
"5374",
"7406",
"7442",
"8511",
"11578",
"11653",
"11671",
"11765",
"11774",
"18997",
"19066",
"19135",
"19204",
"19362",
"19372",
"30621",
"31925",
"31935",
"31946",
"31956",
"47038",
"47264",
"55573",
"64993"
]
| [
"nonn"
]
| 16 | 1 | 1 | [
"A000720",
"A052435",
"A282870",
"A359145"
]
| null | N. J. A. Sloane, Feb 06 2023 | 2023-02-07T17:09:56 | oeisdata/seq/A359/A359145.seq | af816f024d3e47588d6fa563b63a203d |
A359146 | Divide a square into n similar rectangles; a(n) is the number of different proportions that are possible. | [
"1",
"1",
"3",
"11",
"51",
"245",
"1372"
]
| [
"nonn",
"more"
]
| 80 | 1 | 3 | [
"A100664",
"A108066",
"A348456",
"A359146"
]
| null | N. J. A. Sloane, Feb 07 2023 | 2025-06-27T21:33:41 | oeisdata/seq/A359/A359146.seq | a0af444bcb442d55c239cb4e7bf023fd |
A359147 | Partial sums of A002326. | [
"1",
"3",
"7",
"10",
"16",
"26",
"38",
"42",
"50",
"68",
"74",
"85",
"105",
"123",
"151",
"156",
"166",
"178",
"214",
"226",
"246",
"260",
"272",
"295",
"316",
"324",
"376",
"396",
"414",
"472",
"532",
"538",
"550",
"616",
"638",
"673",
"682",
"702",
"732",
"771",
"825",
"907",
"915",
"943",
"954",
"966",
"976",
"1012",
"1060",
"1090",
"1190",
"1241",
"1253",
"1359",
"1395",
"1431"
]
| [
"nonn"
]
| 36 | 0 | 2 | [
"A002326",
"A007733",
"A218342",
"A359147"
]
| null | N. J. A. Sloane, Feb 14 2023 | 2023-07-08T10:51:45 | oeisdata/seq/A359/A359147.seq | 4c19419e53d4c402fdbd0c505905d227 |
A359148 | 1, together with numbers k such that A173426(k) is prime. | [
"1",
"10",
"2446"
]
| [
"nonn",
"base",
"more",
"bref",
"hard"
]
| 28 | 1 | 2 | [
"A173426",
"A359148",
"A360503"
]
| null | N. J. A. Sloane, Feb 17 2023 | 2024-01-30T11:48:42 | oeisdata/seq/A359/A359148.seq | 0a4b5e88855e6bfa51c164638bd1276c |
A359149 | Concatenate the binary strings for 1,2,...,n-1, n, n-1, ..., 2,1. | [
"1",
"1101",
"11011101",
"1101110011101",
"1101110010110011101",
"1101110010111010110011101",
"1101110010111011111010110011101",
"11011100101110111100011111010110011101",
"1101110010111011110001001100011111010110011101",
"110111001011101111000100110101001100011111010110011101"
]
| [
"nonn",
"base"
]
| 15 | 1 | 2 | [
"A007088",
"A173426",
"A173427",
"A359149",
"A360504"
]
| null | N. J. A. Sloane, Feb 18 2023 | 2023-02-19T16:17:42 | oeisdata/seq/A359/A359149.seq | e409381f84b86e52ddff27b610a5cf2c |
A359150 | a(n) = 1 if n is a number of the form 4u+1 with an odd number of prime factors (counted with multiplicity), otherwise 0. | [
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"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",
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"0",
"1",
"0",
"0",
"0",
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"1",
"0",
"0",
"0",
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"0",
"0",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0"
]
| [
"nonn"
]
| 11 | 1 | null | [
"A066829",
"A121262",
"A353558",
"A358678",
"A359150",
"A359151",
"A359152",
"A359160"
]
| null | Antti Karttunen, Dec 17 2022 | 2022-12-17T22:53:35 | oeisdata/seq/A359/A359150.seq | f09c319aee4449d08268981afd46c667 |
A359151 | Numbers of the form 4u+1 with an odd number of prime factors (counted with multiplicity). | [
"5",
"13",
"17",
"29",
"37",
"41",
"45",
"53",
"61",
"73",
"89",
"97",
"101",
"105",
"109",
"113",
"117",
"125",
"137",
"149",
"153",
"157",
"165",
"173",
"181",
"193",
"197",
"229",
"233",
"241",
"245",
"257",
"261",
"269",
"273",
"277",
"281",
"285",
"293",
"313",
"317",
"325",
"333",
"337",
"345",
"349",
"353",
"357",
"369",
"373",
"385",
"389",
"397",
"401",
"405",
"409",
"421",
"425",
"429",
"433",
"449",
"457",
"461"
]
| [
"nonn"
]
| 6 | 1 | 1 | [
"A002144",
"A016813",
"A026424",
"A067019",
"A191218",
"A359150",
"A359151",
"A359153",
"A359161"
]
| null | Antti Karttunen, Dec 17 2022 | 2022-12-17T20:02:31 | oeisdata/seq/A359/A359151.seq | e3c1e682ee166f7de8aad8f7c28b4317 |
A359152 | a(n) = 1 if n is a number of the form 4u+3 with an odd number of prime factors (counted with multiplicity), otherwise 0. | [
"0",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
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"0",
"0",
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"0",
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"1",
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"1",
"0",
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"1",
"0",
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"1",
"0",
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"0",
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"0",
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"0",
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"1",
"0",
"0",
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"1",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0"
]
| [
"nonn"
]
| 11 | 1 | null | [
"A066829",
"A121262",
"A353558",
"A359150",
"A359152",
"A359153",
"A359162"
]
| null | Antti Karttunen, Dec 17 2022 | 2025-01-25T13:05:51 | oeisdata/seq/A359/A359152.seq | 96c3852b433b58d07e1595ed7671de50 |
A359153 | Numbers of the form 4u+3 with an odd number of prime factors (counted with multiplicity). | [
"3",
"7",
"11",
"19",
"23",
"27",
"31",
"43",
"47",
"59",
"63",
"67",
"71",
"75",
"79",
"83",
"99",
"103",
"107",
"127",
"131",
"139",
"147",
"151",
"163",
"167",
"171",
"175",
"179",
"191",
"195",
"199",
"207",
"211",
"223",
"227",
"231",
"239",
"243",
"251",
"255",
"263",
"271",
"275",
"279",
"283",
"307",
"311",
"331",
"343",
"347",
"359",
"363",
"367",
"379",
"383",
"387",
"399",
"419",
"423",
"431",
"435",
"439",
"443"
]
| [
"nonn"
]
| 7 | 1 | 1 | [
"A002145",
"A004767",
"A026424",
"A067019",
"A359151",
"A359152",
"A359153",
"A359163"
]
| null | Antti Karttunen, Dec 17 2022 | 2025-06-01T15:22:58 | oeisdata/seq/A359/A359153.seq | 48318b35e4a37d8f7db11e623a5f4752 |
A359154 | a(n) = (-1)^sopfr(n), where sopfr is the sum of prime factors with repetition. | [
"1",
"1",
"-1",
"1",
"-1",
"-1",
"-1",
"1",
"1",
"-1",
"-1",
"-1",
"-1",
"-1",
"1",
"1",
"-1",
"1",
"-1",
"-1",
"1",
"-1",
"-1",
"-1",
"1",
"-1",
"-1",
"-1",
"-1",
"1",
"-1",
"1",
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"1",
"1",
"-1",
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"1",
"-1",
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"-1",
"1",
"1",
"1",
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"-1",
"-1",
"1",
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"1",
"-1",
"-1",
"1",
"-1",
"-1",
"-1",
"1",
"1",
"1",
"-1",
"-1",
"1",
"1",
"-1",
"1",
"-1",
"-1",
"-1",
"-1",
"1",
"1",
"-1",
"-1",
"1",
"-1",
"-1",
"1",
"1",
"-1",
"1",
"-1",
"-1",
"-1",
"1",
"-1",
"1",
"-1",
"1",
"-1",
"-1",
"1",
"-1",
"1",
"-1",
"1",
"-1",
"-1",
"-1"
]
| [
"sign",
"mult"
]
| 24 | 1 | null | [
"A001414",
"A003961",
"A008836",
"A356163",
"A359154",
"A359155"
]
| null | Antti Karttunen, Dec 19 2022 | 2023-02-11T08:09:51 | oeisdata/seq/A359/A359154.seq | 7f16e4f65ce8af524c3d256fb1f0cd81 |
A359155 | Dirichlet inverse of A359154, where A359154 is multiplicative with a(p^e) = (-1)^(p*e). | [
"1",
"-1",
"1",
"0",
"1",
"-1",
"1",
"0",
"0",
"-1",
"1",
"0",
"1",
"-1",
"1",
"0",
"1",
"0",
"1",
"0",
"1",
"-1",
"1",
"0",
"0",
"-1",
"0",
"0",
"1",
"-1",
"1",
"0",
"1",
"-1",
"1",
"0",
"1",
"-1",
"1",
"0",
"1",
"-1",
"1",
"0",
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"1",
"0",
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"0",
"1",
"0",
"1",
"0",
"1",
"0",
"1",
"-1",
"1",
"0",
"1",
"-1",
"0",
"0",
"1",
"-1",
"1",
"0",
"1",
"-1",
"1",
"0",
"1",
"-1",
"0",
"0",
"1",
"-1",
"1",
"0",
"0",
"-1",
"1",
"0",
"1",
"-1",
"1",
"0",
"1",
"0",
"1",
"0",
"1",
"-1",
"1",
"0",
"1",
"0",
"0",
"0",
"1",
"-1",
"1",
"0",
"1"
]
| [
"sign",
"mult"
]
| 21 | 1 | null | [
"A001414",
"A003961",
"A008683",
"A008966",
"A359154",
"A359155"
]
| null | Antti Karttunen, Dec 19 2022 | 2022-12-29T06:31:10 | oeisdata/seq/A359/A359155.seq | 456262d405eb153b4538abd676c7597f |
A359156 | a(n) = 1 if the odd part of n is squarefree and the number of prime factors of n (with multiplicity) is even, otherwise 0. | [
"1",
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"0",
"1",
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| [
"nonn"
]
| 17 | 1 | null | [
"A000265",
"A001222",
"A065043",
"A166486",
"A185199",
"A353627",
"A355689",
"A359156",
"A359157",
"A359158"
]
| null | Antti Karttunen, Dec 20 2022 | 2023-01-18T02:24:15 | oeisdata/seq/A359/A359156.seq | 8303a7a6389f58cb64bd964bc9f4d753 |
A359157 | Numbers whose odd part is squarefree and the number of prime factors (with multiplicity) is even. | [
"1",
"4",
"6",
"10",
"14",
"15",
"16",
"21",
"22",
"24",
"26",
"33",
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"35",
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"166",
"177"
]
| [
"nonn"
]
| 13 | 1 | 2 | [
"A028260",
"A122132",
"A166486",
"A185199",
"A355689",
"A359156",
"A359157",
"A359159"
]
| null | Antti Karttunen, Dec 20 2022 | 2023-01-18T02:24:19 | oeisdata/seq/A359/A359157.seq | 3e33dd6baebbabffafc388da13c2a63b |
A359158 | a(n) = 1 if the odd part of n is squarefree and the number of prime factors of n (with multiplicity) is odd, otherwise 0. | [
"0",
"1",
"1",
"0",
"1",
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]
| [
"nonn"
]
| 18 | 1 | null | [
"A000265",
"A001222",
"A010051",
"A066829",
"A166486",
"A185199",
"A353627",
"A355689",
"A359156",
"A359158",
"A359159"
]
| null | Antti Karttunen, Dec 20 2022 | 2023-01-18T02:24:12 | oeisdata/seq/A359/A359158.seq | bd465e0d213eb5a19462c1074d91db92 |
A359159 | Numbers whose odd part is squarefree and the number of prime factors (with multiplicity) is odd. | [
"2",
"3",
"5",
"7",
"8",
"11",
"12",
"13",
"17",
"19",
"20",
"23",
"28",
"29",
"30",
"31",
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"137",
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"139",
"148",
"149",
"151",
"154",
"157",
"163",
"164",
"165"
]
| [
"nonn"
]
| 12 | 1 | 1 | [
"A026424",
"A122132",
"A166486",
"A185199",
"A355689",
"A359157",
"A359158",
"A359159"
]
| null | Antti Karttunen, Dec 20 2022 | 2023-01-18T02:24:07 | oeisdata/seq/A359/A359159.seq | 82cc989923d06b019812b80406c65f91 |
A359160 | a(n) = 1 if n is a number of the form 4u+1 with an even number of prime factors (counted with multiplicity), otherwise 0. | [
"1",
"0",
"0",
"0",
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]
| [
"nonn"
]
| 9 | 1 | null | [
"A065043",
"A121262",
"A353477",
"A353557",
"A359150",
"A359160",
"A359161",
"A359162"
]
| null | Antti Karttunen, Dec 17 2022 | 2022-12-17T22:53:42 | oeisdata/seq/A359/A359160.seq | ad0e883c6fbc0228f39c0399f872ef41 |
A359161 | Numbers of the form 4u+1 with an even number of prime factors (counted with multiplicity). | [
"1",
"9",
"21",
"25",
"33",
"49",
"57",
"65",
"69",
"77",
"81",
"85",
"93",
"121",
"129",
"133",
"141",
"145",
"161",
"169",
"177",
"185",
"189",
"201",
"205",
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"237",
"249",
"253",
"265",
"289",
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"301",
"305",
"309",
"321",
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"341",
"361",
"365",
"377",
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"393",
"413",
"417",
"437",
"441",
"445",
"453",
"469",
"473",
"481",
"485",
"489",
"493",
"497",
"501",
"505",
"513"
]
| [
"nonn"
]
| 6 | 1 | 2 | [
"A016813",
"A028260",
"A046337",
"A108181",
"A359151",
"A359160",
"A359161",
"A359163"
]
| null | Antti Karttunen, Dec 17 2022 | 2022-12-17T20:03:19 | oeisdata/seq/A359/A359161.seq | 8048d4aa823be89d3e173112ed0fb763 |
A359162 | a(n) = 1 if n is a number of the form 4u+3 with an even number of prime factors (counted with multiplicity), otherwise 0. | [
"0",
"0",
"0",
"0",
"0",
"0",
"0",
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]
| [
"nonn"
]
| 16 | 1 | null | [
"A065043",
"A121262",
"A353479",
"A353557",
"A359152",
"A359160",
"A359162",
"A359163"
]
| null | Antti Karttunen, Dec 17 2022 | 2022-12-17T22:53:46 | oeisdata/seq/A359/A359162.seq | 5f158677b2eb0ed61b1ba9847f38e8e8 |
A359163 | Numbers of the form 4u+3 with an even number of prime factors (counted with multiplicity). | [
"15",
"35",
"39",
"51",
"55",
"87",
"91",
"95",
"111",
"115",
"119",
"123",
"135",
"143",
"155",
"159",
"183",
"187",
"203",
"215",
"219",
"235",
"247",
"259",
"267",
"287",
"291",
"295",
"299",
"303",
"315",
"319",
"323",
"327",
"335",
"339",
"351",
"355",
"371",
"375",
"391",
"395",
"403",
"407",
"411",
"415",
"427",
"447",
"451",
"459",
"471",
"495",
"511",
"515",
"519",
"527",
"535",
"543",
"551",
"559",
"579",
"583"
]
| [
"nonn"
]
| 8 | 1 | 1 | [
"A004767",
"A028260",
"A046337",
"A080774",
"A359153",
"A359161",
"A359162",
"A359163"
]
| null | Antti Karttunen, Dec 17 2022 | 2022-12-17T20:03:09 | oeisdata/seq/A359/A359163.seq | 06279232b63554f57f163a7c4e64aa3a |
A359164 | Difference between Kimberling's paraphrases and its Möbius transform. | [
"0",
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"1",
"1",
"2",
"1",
"1",
"2",
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]
| [
"nonn"
]
| 14 | 1 | 6 | [
"A003602",
"A008683",
"A111333",
"A349135",
"A349136",
"A359164",
"A359165"
]
| null | Antti Karttunen, Dec 22 2022 | 2022-12-23T11:25:19 | oeisdata/seq/A359/A359164.seq | fc0bc251fc1e0ec59e2775fd51cdfeba |
A359165 | Difference between A126760 and its Möbius transform. | [
"0",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"3",
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"1",
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"4",
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"7",
"8",
"11",
"16",
"8",
"1",
"1",
"17"
]
| [
"nonn"
]
| 12 | 1 | 10 | [
"A008683",
"A126760",
"A323882",
"A347233",
"A359164",
"A359165"
]
| null | Antti Karttunen, Dec 22 2022 | 2022-12-23T11:25:41 | oeisdata/seq/A359/A359165.seq | 37bbd5a868fafbf0cc13ff41a909b1b0 |
A359166 | a(n) = lambda(n) * lambda(sigma(n)), where lambda is Liouville's lambda, and sigma is the sum of divisors function. | [
"1",
"1",
"-1",
"-1",
"-1",
"-1",
"1",
"-1",
"-1",
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"1",
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]
| [
"sign",
"mult"
]
| 11 | 1 | null | [
"A000203",
"A001222",
"A008836",
"A058063",
"A358766",
"A359166",
"A359167",
"A359168"
]
| null | Antti Karttunen, Dec 19 2022 | 2022-12-24T03:37:17 | oeisdata/seq/A359/A359166.seq | db0b3b0d7007f6fb545edad3ad2180e7 |
A359167 | Numbers k for which there is an even number of prime factors (when counted with multiplicity) in k*sigma(k), where sigma is the sum of divisors function. | [
"1",
"2",
"7",
"11",
"12",
"14",
"15",
"17",
"19",
"20",
"22",
"24",
"29",
"30",
"31",
"32",
"34",
"36",
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"111",
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"115",
"117",
"119",
"121",
"127",
"128",
"130",
"132",
"133",
"134",
"135",
"137",
"138"
]
| [
"nonn"
]
| 7 | 1 | 2 | [
"A000203",
"A001222",
"A058063",
"A359166",
"A359167",
"A359168"
]
| null | Antti Karttunen, Dec 19 2022 | 2022-12-19T15:07:45 | oeisdata/seq/A359/A359167.seq | 67e40c27683c1501ef032b31221ce8fc |
A359168 | Numbers k for which there is an odd number of prime factors (when counted with multiplicity) in k*sigma(k), where sigma is the sum of divisors function. | [
"3",
"4",
"5",
"6",
"8",
"9",
"10",
"13",
"16",
"18",
"21",
"23",
"25",
"26",
"27",
"28",
"33",
"35",
"37",
"42",
"44",
"46",
"50",
"51",
"53",
"54",
"55",
"56",
"57",
"59",
"60",
"61",
"63",
"64",
"66",
"68",
"70",
"73",
"74",
"76",
"83",
"85",
"87",
"88",
"89",
"91",
"93",
"95",
"96",
"99",
"102",
"103",
"106",
"110",
"112",
"114",
"116",
"118",
"120",
"122",
"123",
"124",
"125",
"126",
"129",
"131",
"136",
"139",
"141",
"143",
"145",
"146"
]
| [
"nonn"
]
| 5 | 1 | 1 | [
"A000203",
"A000396",
"A001222",
"A005820",
"A046060",
"A058063",
"A065997",
"A358767",
"A358768",
"A359166",
"A359167",
"A359168"
]
| null | Antti Karttunen, Dec 19 2022 | 2022-12-19T15:07:50 | oeisdata/seq/A359/A359168.seq | 4f8b8a6f34405ec4713c05b1677f1944 |
A359169 | Dirichlet inverse of the pointwise sum of A349905 (arithmetic derivative of prime shifted n) and A063524 (1, 0, 0, 0, ...). | [
"1",
"-1",
"-1",
"-5",
"-1",
"-6",
"-1",
"-16",
"-9",
"-8",
"-1",
"-14",
"-1",
"-12",
"-10",
"-35",
"-1",
"-22",
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"-13",
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"-1",
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"-1",
"140",
"-1",
"-38",
"-86",
"160",
"-22",
"-41",
"-1",
"-70",
"-32",
"-53"
]
| [
"sign"
]
| 9 | 1 | 4 | [
"A003415",
"A003961",
"A346241",
"A349905",
"A359169"
]
| null | Antti Karttunen, Dec 23 2022 | 2022-12-23T17:26:25 | oeisdata/seq/A359/A359169.seq | 844837bae1ea4848e34022c1c2a3a077 |
A359170 | a(n) = 1 if n is not a multiple of 3 and has an even number of prime factors (with multiplicity), otherwise a(n) = 0. | [
"1",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"1",
"0",
"0",
"1",
"0",
"1",
"0",
"0",
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"0",
"0",
"1",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"1",
"1",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"1",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"1",
"1",
"0",
"1",
"0",
"0",
"1",
"0",
"0",
"1",
"1",
"0",
"0",
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"0",
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"0",
"0",
"0",
"1",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"1",
"1",
"0",
"1"
]
| [
"nonn"
]
| 9 | 1 | null | [
"A001222",
"A010872",
"A011655",
"A065043",
"A359170",
"A359171",
"A359172",
"A359370",
"A359378"
]
| null | Antti Karttunen, Dec 30 2022 | 2022-12-31T11:19:27 | oeisdata/seq/A359/A359170.seq | 02fc3b9ece9df36a897d86ee250b521e |
A359171 | Nonmultiples of 3 that have an even number of prime factors (with multiplicity). | [
"1",
"4",
"10",
"14",
"16",
"22",
"25",
"26",
"34",
"35",
"38",
"40",
"46",
"49",
"55",
"56",
"58",
"62",
"64",
"65",
"74",
"77",
"82",
"85",
"86",
"88",
"91",
"94",
"95",
"100",
"104",
"106",
"115",
"118",
"119",
"121",
"122",
"133",
"134",
"136",
"140",
"142",
"143",
"145",
"146",
"152",
"155",
"158",
"160",
"161",
"166",
"169",
"178",
"184",
"185",
"187",
"194",
"196",
"202",
"203",
"205",
"206",
"209",
"214",
"215",
"217",
"218"
]
| [
"nonn"
]
| 10 | 1 | 2 | [
"A001651",
"A008836",
"A010872",
"A028260",
"A359170",
"A359171",
"A359371",
"A359378",
"A359381"
]
| null | Antti Karttunen, Dec 30 2022 | 2022-12-30T16:11:44 | oeisdata/seq/A359/A359171.seq | 8f27ee82b69762f2635bfdd7357b2843 |
A359172 | a(n) = 1 if n is not a multiple of 3 and has an odd number of prime factors (with multiplicity), otherwise a(n) = 0. | [
"0",
"1",
"0",
"0",
"1",
"0",
"1",
"1",
"0",
"0",
"1",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"1",
"1",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"1",
"1",
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"1",
"1",
"0",
"0",
"0",
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"1",
"0",
"0",
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"1",
"1",
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"0",
"1",
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"1",
"1",
"0",
"0",
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"0",
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"0",
"1",
"0",
"0",
"0",
"0",
"0",
"1",
"1",
"0",
"1",
"1",
"0",
"1",
"0",
"0",
"1",
"0",
"0",
"1",
"1",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"1",
"1",
"0",
"0",
"1",
"0",
"1",
"0",
"0",
"0",
"1",
"0",
"1",
"1",
"0",
"1",
"1",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"1"
]
| [
"nonn"
]
| 9 | 1 | null | [
"A001222",
"A010872",
"A011655",
"A066829",
"A359170",
"A359172",
"A359372",
"A359378",
"A359381"
]
| null | Antti Karttunen, Dec 30 2022 | 2022-12-31T11:19:31 | oeisdata/seq/A359/A359172.seq | 4ce9975fa87fa83147033ec54c619ea0 |
A359173 | Numbers whose square can be expressed as k * A004086(k) with non-palindromic k. | [
"10",
"20",
"30",
"40",
"50",
"60",
"70",
"80",
"90",
"100",
"110",
"200",
"220",
"252",
"300",
"330",
"400",
"403",
"440",
"500",
"504",
"550",
"600",
"660",
"700",
"770",
"800",
"816",
"880",
"900",
"990",
"1000",
"1010",
"1100",
"1110",
"1210",
"1310",
"1410",
"1510",
"1610",
"1710",
"1810",
"1910",
"2000",
"2020",
"2120",
"2200",
"2220",
"2320",
"2420",
"2520",
"2620",
"2720",
"2772"
]
| [
"nonn",
"base"
]
| 17 | 1 | 1 | [
"A000290",
"A002113",
"A004086",
"A118959",
"A359173"
]
| null | Hugo Pfoertner, Dec 17 2022 | 2022-12-23T11:21:27 | oeisdata/seq/A359/A359173.seq | 1382a4f7fc5bc06e9f7899e43c2ae765 |
A359174 | First of three consecutive primes p, q, r, such that the reverse of p+q+r is divisible by at least one of p, q and r. | [
"3",
"7",
"17",
"53",
"97",
"193",
"431",
"1997",
"5381",
"30097",
"128663",
"278209",
"385831",
"481141",
"1217509",
"2401991",
"2485831",
"2625911",
"3070037",
"35912561",
"39202231",
"44531771",
"45393841",
"47084041",
"50037011",
"53639681",
"54693481",
"54949481",
"55225217",
"56094281",
"56885351",
"58632851",
"59858651",
"61030121",
"62932621",
"64195073",
"64683491"
]
| [
"nonn",
"base"
]
| 13 | 1 | 1 | [
"A004086",
"A034961",
"A359174"
]
| null | Robert Israel, Dec 27 2022 | 2022-12-31T02:31:42 | oeisdata/seq/A359/A359174.seq | 7584a909b85a92516341e773ba123d70 |
A359175 | a(n) = binomial(2*n-2,n) - 2*(n-1). | [
"0",
"9",
"48",
"200",
"780",
"2989",
"11424",
"43740",
"167940",
"646624",
"2496120",
"9657674",
"37442132",
"145422645",
"565722688",
"2203961396",
"8597496564",
"33578000572",
"131282408360",
"513791607378",
"2012616400036",
"7890371113904",
"30957699535728"
]
| [
"nonn"
]
| 21 | 3 | 2 | [
"A001791",
"A350653",
"A359175"
]
| null | Enrique Navarrete, Dec 27 2022 | 2024-03-25T10:43:32 | oeisdata/seq/A359/A359175.seq | 32da333123f153343eb411c6226aff8c |
A359176 | a(n) = binomial(2*n-2,n-1) - n. | [
"0",
"0",
"3",
"16",
"65",
"246",
"917",
"3424",
"12861",
"48610",
"184745",
"705420",
"2704143",
"10400586",
"40116585",
"155117504",
"601080373",
"2333606202",
"9075135281",
"35345263780",
"137846528799",
"538257874418",
"2104098963697",
"8233430727576",
"32247603683075",
"126410606437726",
"495918532948077"
]
| [
"nonn"
]
| 24 | 1 | 3 | [
"A000984",
"A359176"
]
| null | Enrique Navarrete, Dec 28 2022 | 2023-04-30T18:17:05 | oeisdata/seq/A359/A359176.seq | de8f0a2cd657d0238c37816f1570d4bb |
A359177 | Product_{n>=1} (1 + a(n) * x^n) = 1 + Sum_{n>=1} prime(n) * x^prime(n). | [
"0",
"2",
"3",
"0",
"-1",
"0",
"9",
"3",
"-18",
"-27",
"38",
"63",
"3",
"-132",
"-54",
"200",
"395",
"-258",
"-666",
"336",
"2111",
"836",
"-3454",
"-4020",
"9290",
"14408",
"1215",
"-43886",
"-13043",
"92456",
"155854",
"-162756",
"-396316",
"43971",
"1201705",
"442641",
"-1922050",
"-3359287",
"3887946",
"9202219",
"529036",
"-24727323",
"-11980753",
"48090463"
]
| [
"sign"
]
| 14 | 1 | 2 | [
"A061397",
"A348128",
"A359177"
]
| null | Seiichi Manyama, Dec 28 2022 | 2022-12-28T09:56:18 | oeisdata/seq/A359/A359177.seq | 8451204c55d7fb040c41b2d3035af7d6 |
A359178 | Numbers with a unique smallest prime exponent. | [
"2",
"3",
"4",
"5",
"7",
"8",
"9",
"11",
"12",
"13",
"16",
"17",
"18",
"19",
"20",
"23",
"24",
"25",
"27",
"28",
"29",
"31",
"32",
"37",
"40",
"41",
"43",
"44",
"45",
"47",
"48",
"49",
"50",
"52",
"53",
"54",
"56",
"59",
"61",
"63",
"64",
"67",
"68",
"71",
"72",
"73",
"75",
"76",
"79",
"80",
"81",
"83",
"88",
"89",
"92",
"96",
"97",
"98",
"99",
"101",
"103",
"104",
"107",
"108",
"109",
"112",
"113",
"116",
"117"
]
| [
"nonn"
]
| 52 | 1 | 1 | [
"A001221",
"A001222",
"A002865",
"A027746",
"A102750",
"A112798",
"A124010",
"A130091",
"A247180",
"A327473",
"A327476",
"A356862",
"A359178",
"A359908",
"A362605",
"A362606",
"A362608",
"A362609",
"A362610",
"A362611",
"A362613",
"A362615"
]
| null | Jens Ahlström, Jan 08 2023 | 2023-05-15T08:45:49 | oeisdata/seq/A359/A359178.seq | 5d916cf058e7b0f206ed27b322278ff4 |
A359179 | Concatenate n consecutive numbers 1..n in a clockwise circle such that n > 1 is also concatenated to 1. Then a(n) is the number (counting with multiplicity) of substrings of digits in this endless loop that are prime. No counting may go over the starting digit again, that is, no substring can extend beyond one full circle. Leading zeros are not allowed. | [
"0",
"1",
"4",
"5",
"4",
"7",
"8",
"10",
"13",
"17",
"21",
"22",
"39",
"41",
"48",
"51",
"63",
"65",
"70",
"66",
"74",
"75",
"81",
"84",
"97",
"93",
"106",
"113",
"98",
"109",
"114",
"123",
"127",
"150",
"141",
"152",
"162",
"161",
"183",
"184",
"185",
"186",
"197",
"207",
"196",
"213",
"214",
"216",
"222",
"208",
"217",
"217",
"238",
"226",
"249",
"230",
"254",
"249",
"250"
]
| [
"nonn",
"base"
]
| 23 | 1 | 3 | [
"A000040",
"A359179"
]
| null | Tamas Sandor Nagy, Dec 17 2022 | 2022-12-18T12:11:17 | oeisdata/seq/A359/A359179.seq | 1b8f5d4718ad722a910478161ce43620 |
A359180 | Numbers k such that k!^2 / 2 + 1 is prime. | [
"2",
"3",
"6",
"18",
"19",
"82",
"1298",
"3139",
"3687",
"4637"
]
| [
"nonn",
"hard",
"more"
]
| 31 | 1 | 1 | [
"A002981",
"A046029",
"A358805",
"A358878",
"A359180"
]
| null | Arsen Vardanyan, Dec 18 2022 | 2023-04-11T03:47:30 | oeisdata/seq/A359/A359180.seq | e0dabb6f3f74e3509067dc0f8846ea03 |
A359181 | Number of commutative BCK-algebras of order n up to isomorphism. | [
"1",
"2",
"5",
"11",
"28",
"72",
"192",
"515",
"1426"
]
| [
"nonn",
"hard",
"more"
]
| 23 | 2 | 2 | [
"A062980",
"A281270",
"A287141",
"A359181"
]
| null | Choiwah Chow, Dec 18 2022 | 2023-01-09T06:53:38 | oeisdata/seq/A359/A359181.seq | eaa30a6342fc260220843bdc9d6587bf |
A359182 | Totient of numbers of least prime signature: a(n) = A000010(A025487(n)). | [
"1",
"1",
"2",
"2",
"4",
"4",
"8",
"8",
"8",
"16",
"12",
"16",
"16",
"32",
"24",
"32",
"32",
"64",
"48",
"48",
"64",
"48",
"72",
"64",
"128",
"96",
"96",
"128",
"96",
"144",
"128",
"256",
"192",
"192",
"256",
"192",
"288",
"240",
"256",
"512",
"288",
"384",
"288",
"432",
"384",
"512",
"384",
"576",
"480",
"512",
"1024",
"576",
"768",
"480",
"576",
"864",
"768",
"1024",
"768"
]
| [
"nonn"
]
| 17 | 1 | 3 | [
"A000005",
"A000010",
"A025487",
"A146288",
"A359182"
]
| null | Hal M. Switkay, Dec 18 2022 | 2023-03-25T04:09:21 | oeisdata/seq/A359/A359182.seq | 97a2d3385bbb5f06b58aac34df62e5cb |
A359183 | a(n) is the smallest number such that when written in all bases from base 2 to base n its leading digit equals the base - 1. | [
"1",
"2",
"54",
"13122",
"15258789062500"
]
| [
"nonn",
"base"
]
| 43 | 2 | 2 | [
"A004053",
"A181929",
"A258107",
"A307254",
"A307255",
"A347053",
"A359183"
]
| null | Scott R. Shannon, Dec 18 2022 | 2023-02-26T19:40:44 | oeisdata/seq/A359/A359183.seq | 12fbb686bf1f18c441bb783ea9bab7c6 |
A359184 | Numbers k such that 30*k - 1, 30*k + 1, 30*k^2 - 1 and 30*k^2 + 1 are all prime. | [
"1",
"14",
"118",
"232",
"538",
"720",
"1155",
"1253",
"2821",
"3151",
"6161",
"6238",
"6916",
"7428",
"7827",
"9009",
"9521",
"9933",
"10284",
"10779",
"11661",
"12348",
"13663",
"13811",
"14092",
"14938",
"15273",
"16323",
"16457",
"17116",
"17940",
"20735",
"21931",
"22022",
"24010",
"24311",
"24375",
"26557",
"28293",
"29645",
"30555",
"33880",
"34033",
"34328",
"35797",
"36413"
]
| [
"nonn"
]
| 15 | 1 | 2 | [
"A014574",
"A176114",
"A283867",
"A359184"
]
| null | Robert Israel, Dec 18 2022 | 2022-12-22T02:10:33 | oeisdata/seq/A359/A359184.seq | 1df28ea00482852ac8f107efa2352bf5 |
A359185 | Numbers k such that for any positive integers x,y, if x*y=k then (x+y)^2+1 is a prime number. | [
"1",
"3",
"5",
"9",
"13",
"19",
"23",
"25",
"39",
"53",
"55",
"73",
"83",
"89",
"109",
"119",
"133",
"149",
"155",
"159",
"169",
"179",
"203",
"223",
"229",
"239",
"263",
"269",
"283",
"299",
"305",
"313",
"339",
"349",
"383",
"395",
"419",
"439",
"443",
"463",
"469",
"473",
"543",
"569",
"593",
"643",
"653",
"673",
"689",
"699",
"703",
"713",
"739",
"763",
"859",
"863",
"889",
"909"
]
| [
"nonn"
]
| 32 | 1 | 2 | [
"A001358",
"A002496",
"A134406",
"A157468",
"A236068",
"A359185"
]
| null | Michel Lagneau, Dec 19 2022 | 2024-03-06T04:54:50 | oeisdata/seq/A359/A359185.seq | 304244598681cae4c1f22aa161ed14b8 |
A359186 | a(n) = Sum_{d|n} d * 4^(d-1). | [
"1",
"9",
"49",
"265",
"1281",
"6201",
"28673",
"131337",
"589873",
"2622729",
"11534337",
"50338105",
"218103809",
"939552777",
"4026533169",
"17180000521",
"73014444033",
"309238241337",
"1305670057985",
"5497560761865",
"23089744212017",
"96757034778633",
"404620279021569",
"1688849910733113"
]
| [
"nonn",
"easy"
]
| 18 | 1 | 2 | [
"A002129",
"A083413",
"A167531",
"A339684",
"A359018",
"A359186",
"A359190"
]
| null | Seiichi Manyama, Dec 19 2022 | 2023-08-27T17:03:18 | oeisdata/seq/A359/A359186.seq | cc1c0ae8e43b608266b1477a9d31c6c1 |
A359187 | Decimal expansion of the real part of (-sqrt(2))^^9, where ^^ indicates tetration or hyper-4 (e.g., 2^^4 = 2^(2^(2^2))). | [
"1",
"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",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"4",
"9",
"9",
"4",
"1",
"7",
"5",
"2",
"6",
"5",
"5",
"0",
"1",
"4",
"7",
"5",
"0",
"5",
"2",
"6",
"9",
"1",
"3",
"4",
"6",
"3",
"9",
"1",
"3",
"5",
"4",
"1",
"2",
"8",
"6",
"7",
"6",
"7",
"4",
"5",
"4",
"0"
]
| [
"easy",
"cons",
"nonn"
]
| 30 | 1 | 46 | [
"A002193",
"A198094",
"A359187",
"A365937"
]
| null | Marco Ripà, Dec 19 2022 | 2023-12-10T09:13:48 | oeisdata/seq/A359/A359187.seq | 4f63182cdcf1fbad12a6400af609f246 |
A359188 | a(n) = Sum_{d|n} mu(n/d) * d * (n/d)^(d-1), where mu() is the Moebius function (A008683). | [
"1",
"1",
"2",
"0",
"4",
"-11",
"6",
"-24",
"-18",
"-79",
"10",
"-276",
"12",
"-447",
"-464",
"-1008",
"16",
"-3636",
"18",
"-5580",
"-5228",
"-11263",
"22",
"-41184",
"-3100",
"-53247",
"-59022",
"-116004",
"28",
"-454501",
"30",
"-524256",
"-649868",
"-1114111",
"-121344",
"-4438368",
"36",
"-4980735",
"-6909200",
"-11106720",
"40",
"-44114197",
"42"
]
| [
"sign"
]
| 17 | 1 | 3 | [
"A000010",
"A008683",
"A167531",
"A359103",
"A359188"
]
| null | Seiichi Manyama, Dec 19 2022 | 2023-08-27T17:03:21 | oeisdata/seq/A359/A359188.seq | 515da8161447bfc2d86f01f0d57fa18b |
A359189 | a(n) = Sum_{d|n} d * 3^(n/d-1). | [
"1",
"5",
"12",
"37",
"86",
"276",
"736",
"2261",
"6597",
"19870",
"59060",
"177780",
"531454",
"1595816",
"4783272",
"14353429",
"43046738",
"129154113",
"387420508",
"1162301342",
"3486786672",
"10460471356",
"31381059632",
"94143540948",
"282429536911",
"847289672390",
"2541865848120",
"7625600676808"
]
| [
"nonn",
"easy"
]
| 12 | 1 | 2 | [
"A054599",
"A359189",
"A359190"
]
| null | Seiichi Manyama, Dec 19 2022 | 2023-08-27T17:03:10 | oeisdata/seq/A359/A359189.seq | 4048763007ebed1ea153a15f151d0c5c |
A359190 | a(n) = Sum_{d|n} d * 4^(n/d-1). | [
"1",
"6",
"19",
"76",
"261",
"1074",
"4103",
"16536",
"65593",
"262686",
"1048587",
"4196644",
"16777229",
"67117098",
"268436319",
"1073774896",
"4294967313",
"17180003478",
"68719476755",
"274878432636",
"1099511640197",
"4398048608322",
"17592186044439",
"70368752620104",
"281474976711961",
"1125899940397134"
]
| [
"nonn",
"easy"
]
| 13 | 1 | 2 | [
"A054599",
"A359189",
"A359190"
]
| null | Seiichi Manyama, Dec 19 2022 | 2023-08-27T17:03:15 | oeisdata/seq/A359/A359190.seq | 605e6da9f4340650718c7122c457b8fb |
A359191 | Number of length n inversion sequences avoiding the patterns 010 and 110. | [
"1",
"1",
"2",
"5",
"15",
"52",
"201",
"847",
"3836",
"18489",
"94153",
"503775",
"2819947",
"16456748",
"99843685",
"628285253",
"4092639203",
"27551233223",
"191405419444",
"1370602542782",
"10105310949388",
"76641003455357",
"597426261051281",
"4782940241616478",
"39300668695536996",
"331231384805916410"
]
| [
"nonn"
]
| 19 | 0 | 3 | [
"A263779",
"A359191"
]
| null | Benjamin Testart, Dec 19 2022 | 2024-07-12T11:18:31 | oeisdata/seq/A359/A359191.seq | 3cac3805a266e48b20e3b59f2b8ec9e9 |
A359192 | a(n) is the smallest square pyramidal number with exactly n prime factors (counted with multiplicity). | [
"1",
"5",
"14",
"30",
"140",
"1240",
"4900",
"10416",
"85344",
"173880",
"1801800",
"5559680",
"44608256",
"357389824",
"44870400",
"110099203200",
"2861214720",
"98269966080",
"982218617856",
"1466149724160",
"11727587164160",
"243912389529600",
"750591347982336",
"1951282875801600",
"37635982963937280",
"460962807482777600"
]
| [
"nonn"
]
| 8 | 0 | 2 | [
"A000330",
"A001222",
"A358927",
"A359192",
"A359193"
]
| null | Ilya Gutkovskiy, Dec 19 2022 | 2025-02-16T08:34:04 | oeisdata/seq/A359/A359192.seq | c53294e02dc75672fdbdb9f8f5c3aad6 |
A359193 | a(n) is the index of the smallest square pyramidal number with exactly n prime factors (counted with multiplicity). | [
"1",
"2",
"3",
"4",
"7",
"15",
"24",
"31",
"63",
"80",
"175",
"255",
"511",
"1023",
"512",
"6912",
"2047",
"6655",
"14336",
"16384",
"32767",
"90112",
"131071",
"180224",
"483327",
"1114112",
"1638400",
"2097151",
"1048575",
"16777216",
"8388607",
"33357824",
"16777215",
"92274687",
"67108864"
]
| [
"nonn",
"more"
]
| 11 | 0 | 2 | [
"A000330",
"A001222",
"A359192",
"A359193"
]
| null | Ilya Gutkovskiy, Dec 19 2022 | 2025-02-16T08:34:04 | oeisdata/seq/A359/A359193.seq | 51717083b2cdfbbc676cf575c6e2890a |
A359194 | Binary complement of 3*n. | [
"1",
"0",
"1",
"6",
"3",
"0",
"13",
"10",
"7",
"4",
"1",
"30",
"27",
"24",
"21",
"18",
"15",
"12",
"9",
"6",
"3",
"0",
"61",
"58",
"55",
"52",
"49",
"46",
"43",
"40",
"37",
"34",
"31",
"28",
"25",
"22",
"19",
"16",
"13",
"10",
"7",
"4",
"1",
"126",
"123",
"120",
"117",
"114",
"111",
"108",
"105",
"102",
"99",
"96",
"93",
"90",
"87",
"84",
"81",
"78",
"75",
"72",
"69",
"66",
"63",
"60",
"57"
]
| [
"nonn",
"base",
"easy"
]
| 48 | 0 | 4 | [
"A002450",
"A020988",
"A035327",
"A256078",
"A359194"
]
| null | Joshua Searle, Dec 19 2022 | 2025-03-24T05:54:48 | oeisdata/seq/A359/A359194.seq | beb8af3ccc65f2a1ffe9c1f510e3a90f |
A359195 | Positive integers k with a smaller fraction of powers (mod k) than any smaller positive integers. | [
"1",
"4",
"16",
"32",
"36",
"72",
"144",
"288",
"432",
"864",
"1728",
"3456",
"3600",
"5400",
"7200",
"10800",
"21600",
"43200",
"86400",
"151200",
"172800",
"216000",
"302400"
]
| [
"nonn",
"more"
]
| 9 | 1 | 2 | [
"A025487",
"A085635",
"A337868",
"A359195"
]
| null | Charles R Greathouse IV, Dec 19 2022 | 2023-01-06T20:47:11 | oeisdata/seq/A359/A359195.seq | 4024410f861021142d88110e3eea467e |
A359196 | a(n) is the number of subsets of the divisors of n which sum to n+1. | [
"0",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"3",
"1",
"1",
"1",
"1",
"1",
"2",
"1",
"2",
"1",
"1",
"1",
"5",
"1",
"1",
"1",
"1",
"1",
"5",
"1",
"1",
"1",
"1",
"1",
"8",
"1",
"1",
"1",
"3",
"1",
"3",
"1",
"1",
"1",
"1",
"1",
"11",
"1",
"1",
"1",
"1",
"1",
"3",
"1",
"3",
"1",
"1",
"1",
"33",
"1",
"1",
"1",
"1",
"1",
"3",
"1",
"1",
"1",
"2",
"1",
"27",
"1",
"1",
"1",
"1",
"1",
"2",
"1",
"7",
"1",
"1",
"1",
"25",
"1",
"1",
"1",
"2",
"1",
"20",
"1",
"1",
"1",
"1",
"1",
"21",
"1",
"1",
"1",
"3"
]
| [
"nonn"
]
| 32 | 1 | 12 | [
"A002182",
"A005101",
"A033630",
"A085491",
"A357050",
"A359196",
"A359197",
"A379504"
]
| null | Robert G. Wilson v, Dec 19 2022 | 2025-01-20T22:52:31 | oeisdata/seq/A359/A359196.seq | 51f09b99114c9879057da6641a5f1f80 |
A359197 | Least number k having n subsets of its divisors whose sum is k+1. | [
"1",
"2",
"18",
"12",
"162",
"24",
"342",
"80",
"36",
"198",
"156",
"48",
"126",
"150",
"1430",
"132",
"1110",
"1302",
"1672",
"448",
"90",
"96",
"784",
"1190",
"1408",
"84",
"320",
"72",
"1064",
"3100",
"16048",
"744",
"702",
"60",
"920",
"690",
"984",
"750",
"594",
"2300",
"714",
"696",
"11024",
"192",
"11696",
"400",
"2028",
"680",
"728",
"1548",
"10672",
"546",
"616",
"2156",
"462",
"324",
"37888",
"510",
"4698"
]
| [
"nonn",
"look"
]
| 41 | 0 | 2 | [
"A005100",
"A359196",
"A359197"
]
| null | Robert G. Wilson v, Dec 19 2022 | 2025-03-24T06:45:57 | oeisdata/seq/A359/A359197.seq | da822d21502101743bac589d80cbe6c2 |
A359198 | Numbers k such that 2*phi(k)-k is a prime, where phi is A000010. | [
"5",
"7",
"9",
"13",
"19",
"21",
"31",
"33",
"35",
"43",
"45",
"51",
"61",
"65",
"69",
"73",
"75",
"77",
"85",
"91",
"103",
"109",
"115",
"119",
"123",
"133",
"139",
"141",
"143",
"145",
"151",
"161",
"181",
"185",
"193",
"199",
"209",
"213",
"221",
"229",
"241",
"249",
"259",
"265",
"271",
"283",
"285",
"287",
"299",
"303",
"313",
"319",
"321",
"329",
"335",
"339"
]
| [
"nonn",
"easy"
]
| 111 | 1 | 1 | [
"A000010",
"A006512",
"A083254",
"A359198"
]
| null | Darío Clavijo, Aug 16 2023 | 2023-09-13T08:50:33 | oeisdata/seq/A359/A359198.seq | 9f2db137a044a304a016660689c920c2 |
A359199 | Least prime p such that 2n can be written as a signed sum of p and the next 3 primes, or -1 if no such prime exists. | [
"5",
"3",
"3",
"3",
"7",
"3",
"3",
"5",
"3",
"19",
"3",
"5",
"79",
"3",
"113",
"17",
"467",
"7",
"5",
"11",
"19",
"17",
"19",
"13",
"7",
"17",
"1123",
"17",
"19",
"23",
"11",
"23",
"19",
"31",
"2153",
"31",
"13",
"23",
"29",
"31",
"29",
"37",
"43",
"37",
"17",
"31",
"19081",
"37",
"43",
"41",
"19319",
"19",
"37897",
"53",
"43",
"54193",
"35671",
"47",
"43",
"53",
"23",
"53",
"59",
"47",
"35603",
"61"
]
| [
"nonn"
]
| 63 | 0 | 1 | [
"A000040",
"A000230",
"A034963",
"A144103",
"A327467",
"A359199",
"A362465",
"A363544"
]
| null | Karl-Heinz Hofmann and Peter Munn, Jun 04 2023 | 2023-09-19T15:37:45 | oeisdata/seq/A359/A359199.seq | d7e41c3f4ecb819aa31f2ba8d171af48 |
A359200 | Triangle read by rows: T(n, k) = A358125(n,k)*binomial(n-1, k), 0 <= k <= n-1. | [
"0",
"1",
"1",
"3",
"8",
"3",
"7",
"30",
"30",
"7",
"15",
"88",
"144",
"88",
"15",
"31",
"230",
"520",
"520",
"230",
"31",
"63",
"564",
"1620",
"2240",
"1620",
"564",
"63",
"127",
"1330",
"4620",
"8120",
"8120",
"4620",
"1330",
"127",
"255",
"3056",
"12432",
"26432",
"33600",
"26432",
"12432",
"3056",
"255",
"511",
"6894",
"32112",
"79968",
"122976",
"122976",
"79968",
"32112",
"6894",
"511"
]
| [
"nonn",
"easy",
"tabl"
]
| 19 | 1 | 4 | [
"A005061",
"A359200"
]
| null | Ambrosio Valencia-Romero, Dec 20 2022 | 2022-12-21T20:42:35 | oeisdata/seq/A359/A359200.seq | 0d40749761148cf3b8941cec0ba50f21 |
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