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A008401 | Coordination sequence for {E_6}* lattice. | [
"1",
"54",
"828",
"5202",
"20376",
"60030",
"146484",
"312858",
"605232",
"1084806",
"1830060",
"2938914",
"4530888",
"6749262",
"9763236",
"13770090",
"18997344",
"25704918",
"34187292",
"44775666",
"57840120",
"73791774",
"93084948"
] | [
"nonn",
"easy",
"nice"
] | 33 | 0 | 2 | [
"A008401",
"A008402"
] | null | N. J. A. Sloane | 2023-12-10T16:08:39 | oeisdata/seq/A008/A008401.seq | 6c993bbac459a097072b71283940be1f |
A008402 | Crystal ball sequence for {E_6}* lattice. | [
"1",
"55",
"883",
"6085",
"26461",
"86491",
"232975",
"545833",
"1151065",
"2235871",
"4065931",
"7004845",
"11535733",
"18284995",
"28048231",
"41818321",
"60815665",
"86520583",
"120707875",
"165483541",
"223323661",
"297115435"
] | [
"nonn",
"nice",
"easy"
] | 40 | 0 | 2 | [
"A008401",
"A008402"
] | null | N. J. A. Sloane | 2023-12-10T16:09:23 | oeisdata/seq/A008/A008402.seq | 7b083ec97023f44012d118b3c4d3f048 |
A008403 | G-symmetric Costas arrays of order n that are inequivalent under dihedral group but are not given by the Welch construction. | [
"0",
"0",
"0",
"0",
"1",
"1",
"0",
"3",
"0",
"14",
"0",
"32",
"4",
"31",
"0",
"45",
"0",
"2",
"0",
"3",
"0",
"0",
"0"
] | [
"nonn",
"hard",
"more"
] | 10 | 1 | 8 | [
"A001440",
"A001441",
"A001442",
"A008403",
"A008404"
] | null | N. J. A. Sloane. | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008403.seq | d60c6328b923ac760bd164a5c9035832 |
A008404 | Number of Costas arrays of order n, counting rotations and flips as distinct. | [
"1",
"2",
"4",
"12",
"40",
"116",
"200",
"444",
"760",
"2160",
"4368",
"7852",
"12828",
"17252",
"19612",
"21104",
"18276",
"15096",
"10240",
"6464",
"3536",
"2052",
"872",
"200",
"88",
"56",
"204",
"712",
"164"
] | [
"nonn",
"more",
"hard"
] | 41 | 1 | 2 | [
"A001441",
"A008404"
] | null | N. J. A. Sloane. | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008404.seq | c00744f24398c3b55c1772cd828e7bb8 |
A008405 | n-th derivative of x^(1/x) at x=1. | [
"1",
"1",
"-2",
"3",
"4",
"-90",
"786",
"-5670",
"34784",
"-136584",
"-824760",
"33137280",
"-633666648",
"10089623544",
"-145675230960",
"1910939579640",
"-21215723677440",
"136130901474240",
"2280768466608576",
"-135531682778927808",
"4380044490023909760",
"-119144344839822570240"
] | [
"sign"
] | 23 | 0 | 3 | null | null | Olivier Gérard | 2013-05-10T12:43:51 | oeisdata/seq/A008/A008405.seq | 29d9e8fa0c309760b0641f9fcc6f83c1 |
A008406 | Triangle T(n,k) read by rows, giving number of graphs with n nodes (n >= 1) and k edges (0 <= k <= n(n-1)/2). | [
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"1",
"2",
"3",
"2",
"1",
"1",
"1",
"1",
"2",
"4",
"6",
"6",
"6",
"4",
"2",
"1",
"1",
"1",
"1",
"2",
"5",
"9",
"15",
"21",
"24",
"24",
"21",
"15",
"9",
"5",
"2",
"1",
"1",
"1",
"1",
"2",
"5",
"10",
"21",
"41",
"65",
"97",
"131",
"148",
"148",
"131",
"97",
"65",
"41",
"21",
"10",
"5",
"2",
"1",
"1",
"1",
"1",
"2",
"5",
"11",
"24",
"56",
"115",
"221",
"402",
"663",
"980",
"1312",
"1557",
"1646",
"1557"
] | [
"nonn",
"tabf",
"nice",
"look"
] | 144 | 1 | 10 | [
"A000055",
"A000088",
"A000124",
"A000664",
"A000717",
"A001349",
"A001430",
"A001431",
"A001432",
"A001433",
"A001434",
"A002905",
"A008406",
"A039735",
"A046742",
"A046751",
"A048179",
"A048180",
"A054924",
"A084546"
] | null | N. J. A. Sloane, Mar 15 1996 | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008406.seq | 1b81b5db2d590bea00d2f729f634ab2f |
A008407 | Minimal difference s(n) between beginning and end of n consecutive large primes (n-tuplet) permitted by divisibility considerations. | [
"0",
"2",
"6",
"8",
"12",
"16",
"20",
"26",
"30",
"32",
"36",
"42",
"48",
"50",
"56",
"60",
"66",
"70",
"76",
"80",
"84",
"90",
"94",
"100",
"110",
"114",
"120",
"126",
"130",
"136",
"140",
"146",
"152",
"156",
"158",
"162",
"168",
"176",
"182",
"186",
"188",
"196",
"200",
"210",
"212",
"216",
"226",
"236",
"240",
"246",
"252",
"254",
"264",
"270",
"272",
"278"
] | [
"nonn",
"nice"
] | 97 | 1 | 2 | [
"A008407",
"A020497",
"A083409"
] | null | T. Forbes (anthony.d.forbes(AT)googlemail.com) | 2025-03-31T09:01:57 | oeisdata/seq/A008/A008407.seq | fabcbaa16db912d76f5294ad1c6805cd |
A008408 | Theta series of Leech lattice. | [
"1",
"0",
"196560",
"16773120",
"398034000",
"4629381120",
"34417656000",
"187489935360",
"814879774800",
"2975551488000",
"9486551299680",
"27052945920000",
"70486236999360",
"169931095326720",
"384163586352000",
"820166620815360",
"1668890090322000"
] | [
"nonn",
"easy",
"nice"
] | 90 | 0 | 3 | [
"A000594",
"A004009",
"A008408",
"A013959",
"A034597",
"A034598",
"A108093",
"A198343"
] | null | N. J. A. Sloane | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008408.seq | 43eebfc180d5860a153cb6bb764118c5 |
A008409 | Theta series of 16-dimensional Barnes-Wall lattice. | [
"1",
"0",
"4320",
"61440",
"522720",
"2211840",
"8960640",
"23224320",
"67154400",
"135168000",
"319809600",
"550195200",
"1147643520",
"1771683840",
"3371915520",
"4826603520",
"8593797600",
"11585617920",
"19590534240",
"25239859200",
"40979580480",
"50877235200"
] | [
"nonn",
"easy",
"nice"
] | 35 | 0 | 3 | [
"A004009",
"A008409",
"A008774",
"A319307"
] | null | N. J. A. Sloane | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008409.seq | ff0219dec57eb03765775d52529bf581 |
A008410 | a(0) = 1, a(n) = 480*sigma_7(n). | [
"1",
"480",
"61920",
"1050240",
"7926240",
"37500480",
"135480960",
"395301120",
"1014559200",
"2296875360",
"4837561920",
"9353842560",
"17342613120",
"30119288640",
"50993844480",
"82051050240",
"129863578080",
"196962563520"
] | [
"nonn"
] | 40 | 0 | 2 | [
"A004009",
"A006352",
"A008410",
"A013973",
"A013974",
"A029828",
"A029829",
"A029830",
"A029831",
"A058550"
] | null | N. J. A. Sloane | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008410.seq | bce8fd2cb2818959e2e33f1d64b8e851 |
A008411 | Theta series of direct sum of 3 copies of E_8 lattice (the Niemeier lattice of type E_8^3). | [
"1",
"720",
"179280",
"16954560",
"396974160",
"4632858720",
"34413301440",
"187477879680",
"814940600400",
"2975469665040",
"9486467837280",
"27053330840640",
"70485969919680",
"169930679355360",
"384163875688320",
"820167497170560",
"1668890801059920",
"3249626139960480",
"6096884624994960"
] | [
"nonn",
"easy"
] | 34 | 0 | 2 | [
"A000594",
"A004009",
"A008411",
"A029828",
"A280869"
] | null | N. J. A. Sloane | 2022-09-09T15:59:07 | oeisdata/seq/A008/A008411.seq | 19855ba3db474230233c0d98111eee1e |
A008412 | Coordination sequence for 4-dimensional cubic lattice (points on surface of 4-dimensional cross-polytope). | [
"1",
"8",
"32",
"88",
"192",
"360",
"608",
"952",
"1408",
"1992",
"2720",
"3608",
"4672",
"5928",
"7392",
"9080",
"11008",
"13192",
"15648",
"18392",
"21440",
"24808",
"28512",
"32568",
"36992",
"41800",
"47008",
"52632",
"58688",
"65192",
"72160",
"79608",
"87552",
"96008",
"104992",
"114520",
"124608",
"135272"
] | [
"nonn",
"easy",
"nice"
] | 96 | 0 | 2 | [
"A001845",
"A001846",
"A005899",
"A006527",
"A008412",
"A035598",
"A035607",
"A113413",
"A119800",
"A122542",
"A266213"
] | null | N. J. A. Sloane | 2024-03-14T16:41:13 | oeisdata/seq/A008/A008412.seq | d307a7129b97a791fb3b5f971f39b2ea |
A008413 | Coordination sequence for 5-dimensional cubic lattice. | [
"1",
"10",
"50",
"170",
"450",
"1002",
"1970",
"3530",
"5890",
"9290",
"14002",
"20330",
"28610",
"39210",
"52530",
"69002",
"89090",
"113290",
"142130",
"176170",
"216002",
"262250",
"315570",
"376650",
"446210",
"525002",
"613810",
"713450",
"824770",
"948650",
"1086002",
"1237770",
"1404930"
] | [
"nonn",
"easy"
] | 44 | 0 | 2 | [
"A008413",
"A035599",
"A035607",
"A113413",
"A119800",
"A122542",
"A266213"
] | null | N. J. A. Sloane | 2023-03-09T09:46:44 | oeisdata/seq/A008/A008413.seq | 4033b8d791ca1296339bfe7b8c2dcd57 |
A008414 | Coordination sequence for 6-dimensional cubic lattice. | [
"1",
"12",
"72",
"292",
"912",
"2364",
"5336",
"10836",
"20256",
"35436",
"58728",
"93060",
"142000",
"209820",
"301560",
"423092",
"581184",
"783564",
"1038984",
"1357284",
"1749456",
"2227708",
"2805528",
"3497748",
"4320608",
"5291820",
"6430632",
"7757892",
"9296112",
"11069532"
] | [
"nonn",
"easy"
] | 37 | 0 | 2 | null | null | N. J. A. Sloane | 2023-11-17T12:10:17 | oeisdata/seq/A008/A008414.seq | 1a4fa6a8d3fc49f9ce97285aef2ece44 |
A008415 | Coordination sequence for 7-dimensional cubic lattice. | [
"1",
"14",
"98",
"462",
"1666",
"4942",
"12642",
"28814",
"59906",
"115598",
"209762",
"361550",
"596610",
"948430",
"1459810",
"2184462",
"3188738",
"4553486",
"6376034",
"8772302",
"11879042",
"15856206",
"20889442",
"27192718",
"35011074",
"44623502",
"56345954",
"70534478"
] | [
"nonn",
"easy"
] | 48 | 0 | 2 | [
"A008414",
"A008415"
] | null | N. J. A. Sloane | 2020-04-27T06:23:19 | oeisdata/seq/A008/A008415.seq | 679980c76edde75c2490fafe1597ccc0 |
A008416 | Coordination sequence for 8-dimensional cubic lattice. | [
"1",
"16",
"128",
"688",
"2816",
"9424",
"27008",
"68464",
"157184",
"332688",
"658048",
"1229360",
"2187520",
"3732560",
"6140800",
"9785072",
"15158272",
"22900496",
"33830016",
"48978352",
"69629696",
"97364944",
"134110592",
"182192752",
"244396544",
"324031120",
"425000576"
] | [
"nonn",
"easy"
] | 70 | 0 | 2 | [
"A005899",
"A008412",
"A008413",
"A008414",
"A008415",
"A008416",
"A008418",
"A008420",
"A008574",
"A113413",
"A122542"
] | null | N. J. A. Sloane | 2024-11-08T04:36:40 | oeisdata/seq/A008/A008416.seq | 90f3b986ef06a868f15ba46c9f3b51d7 |
A008417 | Crystal ball sequence for 8-dimensional cubic lattice. | [
"1",
"17",
"145",
"833",
"3649",
"13073",
"40081",
"108545",
"265729",
"598417",
"1256465",
"2485825",
"4673345",
"8405905",
"14546705",
"24331777",
"39490049",
"62390545",
"96220561",
"145198913",
"214828609",
"312193553",
"446304145",
"628496897",
"872893441",
"1196924561",
"1621925137",
"2173806145",
"2883810113",
"3789356689",
"4934985233"
] | [
"nonn",
"easy"
] | 41 | 0 | 2 | [
"A001849",
"A008288",
"A008416",
"A008417",
"A099196",
"A240876"
] | null | N. J. A. Sloane. | 2024-05-26T14:42:21 | oeisdata/seq/A008/A008417.seq | 2da8aa4216a7cfd66960363942a32cd3 |
A008418 | Coordination sequence for 9-dimensional cubic lattice. | [
"1",
"18",
"162",
"978",
"4482",
"16722",
"53154",
"148626",
"374274",
"864146",
"1854882",
"3742290",
"7159170",
"13079250",
"22952610",
"38878482",
"63821826",
"101880594",
"158611106",
"241419474",
"360027522",
"527022162",
"758497698",
"1074801042",
"1501390338"
] | [
"nonn",
"easy"
] | 28 | 0 | 2 | null | null | N. J. A. Sloane | 2024-11-11T00:20:28 | oeisdata/seq/A008/A008418.seq | 95ab53e5d99c564b5f343f491700c71b |
A008419 | Crystal ball sequence for 9-dimensional cubic lattice. | [
"1",
"19",
"181",
"1159",
"5641",
"22363",
"75517",
"224143",
"598417",
"1462563",
"3317445",
"7059735",
"14218905",
"27298155",
"50250765",
"89129247",
"152951073",
"254831667",
"413442773",
"654862247",
"1014889769",
"1541911931",
"2300409629",
"3375210671",
"4876601009",
"6946419011",
"9765268709"
] | [
"nonn",
"easy"
] | 42 | 0 | 2 | [
"A001847",
"A001848",
"A001849",
"A008288",
"A008419",
"A240876"
] | null | N. J. A. Sloane. | 2024-03-23T08:22:46 | oeisdata/seq/A008/A008419.seq | 439bfc6b4b7825caeea8dd79c94f37ae |
A008420 | Coordination sequence for 10-dimensional cubic lattice. | [
"1",
"20",
"200",
"1340",
"6800",
"28004",
"97880",
"299660",
"822560",
"2060980",
"4780008",
"10377180",
"21278640",
"41517060",
"77548920",
"139380012",
"242080320",
"407782740",
"668274440",
"1068305020",
"1669752016",
"2556801700",
"3842321560",
"5675620300"
] | [
"nonn",
"easy"
] | 23 | 0 | 2 | null | null | N. J. A. Sloane | 2018-06-06T14:37:04 | oeisdata/seq/A008/A008420.seq | ddff7a7c16a0abeaea8515242ad90203 |
A008421 | Crystal ball sequence for 10-dimensional cubic lattice. | [
"1",
"21",
"221",
"1561",
"8361",
"36365",
"134245",
"433905",
"1256465",
"3317445",
"8097453",
"18474633",
"39753273",
"81270333",
"158819253",
"298199265",
"540279585",
"948062325",
"1616336765",
"2684641785",
"4354393801",
"6911195501",
"10753517061",
"16429137361",
"24680949041",
"36503969061"
] | [
"nonn",
"easy"
] | 24 | 0 | 2 | [
"A001847",
"A001848",
"A001849",
"A008288",
"A008421",
"A240876"
] | null | N. J. A. Sloane. | 2023-05-28T10:29:32 | oeisdata/seq/A008/A008421.seq | 405608db23a3d829266cd10862312ee0 |
A008422 | Theta series of D*_5 lattice. | [
"1",
"0",
"0",
"0",
"10",
"32",
"0",
"0",
"40",
"0",
"0",
"0",
"80",
"160",
"0",
"0",
"90",
"0",
"0",
"0",
"112",
"320",
"0",
"0",
"240",
"0",
"0",
"0",
"320",
"480",
"0",
"0",
"200",
"0",
"0",
"0",
"250",
"800",
"0",
"0",
"560",
"0",
"0",
"0",
"560",
"992",
"0",
"0",
"400",
"0",
"0",
"0",
"560",
"1120",
"0",
"0",
"800",
"0",
"0",
"0",
"960",
"1760",
"0",
"0",
"730",
"0",
"0",
"0",
"480",
"1920",
"0",
"0",
"1240",
"0",
"0",
"0",
"1520",
"1920"
] | [
"nonn",
"easy"
] | 26 | 0 | 5 | null | null | N. J. A. Sloane | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008422.seq | 27e5cb5bdbef6b7c884e21d6a22f030c |
A008423 | Theta series of {D_7}* lattice. | [
"1",
"0",
"0",
"0",
"14",
"0",
"0",
"128",
"84",
"0",
"0",
"0",
"280",
"0",
"0",
"896",
"574",
"0",
"0",
"0",
"840",
"0",
"0",
"2688",
"1288",
"0",
"0",
"0",
"2368",
"0",
"0",
"5376",
"3444",
"0",
"0",
"0",
"3542",
"0",
"0",
"9856",
"4424",
"0",
"0",
"0",
"7560",
"0",
"0",
"16128",
"9240",
"0",
"0",
"0",
"8456",
"0",
"0"
] | [
"nonn",
"easy"
] | 12 | 0 | 5 | null | null | N. J. A. Sloane | 2018-03-28T23:14:29 | oeisdata/seq/A008/A008423.seq | 823fa68fa13a030264e0936846802ef0 |
A008424 | Theta series of {D_9}* lattice. | [
"1",
"0",
"0",
"0",
"18",
"0",
"0",
"0",
"144",
"512",
"0",
"0",
"672",
"0",
"0",
"0",
"2034",
"4608",
"0",
"0",
"4320",
"0",
"0",
"0",
"7392",
"18432",
"0",
"0",
"12672",
"0",
"0",
"0",
"22608",
"47616",
"0",
"0",
"34802",
"0",
"0",
"0",
"44640",
"101376",
"0",
"0",
"60768",
"0",
"0",
"0",
"93984",
"193536",
"0",
"0",
"125280",
"0",
"0",
"0",
"141120",
"324096",
"0",
"0"
] | [
"nonn",
"easy"
] | 19 | 0 | 5 | [
"A008424",
"A008431"
] | null | N. J. A. Sloane | 2021-07-24T02:24:31 | oeisdata/seq/A008/A008424.seq | f0202fa65c3f2202056cc8591b89f468 |
A008425 | Theta series of {D_6}* lattice. | [
"1",
"0",
"12",
"64",
"60",
"0",
"160",
"384",
"252",
"0",
"312",
"960",
"544",
"0",
"960",
"1664",
"1020",
"0",
"876",
"2880",
"1560",
"0",
"2400",
"4224",
"2080",
"0",
"2040",
"5248",
"3264",
"0",
"4160",
"7680",
"4092",
"0",
"3480",
"9984",
"4380",
"0",
"7200",
"10880",
"6552",
"0",
"4608",
"14784",
"8160",
"0",
"10560",
"17664",
"8224",
"0",
"7812",
"18560"
] | [
"nonn",
"easy"
] | 30 | 0 | 3 | [
"A000141",
"A008425",
"A008428"
] | null | N. J. A. Sloane | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008425.seq | 33ee14e8429d1b13211422a9df273854 |
A008426 | Theta series of {D_10}* lattice. | [
"1",
"0",
"20",
"0",
"180",
"1024",
"960",
"0",
"3380",
"10240",
"8424",
"0",
"16320",
"46080",
"28800",
"0",
"52020",
"133120",
"88660",
"0",
"129064",
"307200",
"175680",
"0",
"262080",
"626688",
"386920",
"0",
"489600",
"1131520",
"600960",
"0",
"840500"
] | [
"nonn",
"easy"
] | 7 | 0 | 3 | null | null | N. J. A. Sloane. | 2012-03-30T16:45:19 | oeisdata/seq/A008/A008426.seq | 5893fe07706cbbb3088feb4f79e66790 |
A008427 | Theta series of {D_8}* lattice. | [
"1",
"16",
"368",
"448",
"3184",
"2016",
"10304",
"5504",
"25712",
"12112",
"46368",
"21312",
"89152",
"35168",
"126592",
"56448",
"205936",
"78624",
"278576",
"109760",
"401184",
"154112",
"490176",
"194688",
"719936",
"252016",
"808864",
"327040"
] | [
"nonn",
"easy"
] | 20 | 0 | 2 | [
"A008427",
"A008430",
"A109772"
] | null | N. J. A. Sloane | 2017-12-13T02:47:32 | oeisdata/seq/A008/A008427.seq | 0358a0f0d0a733df6283bbec2e2bcbe3 |
A008428 | Theta series of D_6 lattice. | [
"1",
"60",
"252",
"544",
"1020",
"1560",
"2080",
"3264",
"4092",
"4380",
"6552",
"8160",
"8224",
"10200",
"12480",
"14144",
"16380",
"17400",
"18396",
"24480",
"26520",
"23040",
"31200",
"35904",
"32800",
"39060",
"42840",
"44608",
"49344",
"50520",
"54080",
"65280",
"65532",
"57600",
"73080",
"84864",
"74460",
"82200",
"93600",
"92480"
] | [
"nonn",
"easy"
] | 30 | 0 | 2 | [
"A000141",
"A008425",
"A008428"
] | null | N. J. A. Sloane | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008428.seq | e1ea39190695cf256cf1172e33cdf21a |
A008429 | Theta series of D_7 lattice. | [
"1",
"84",
"574",
"1288",
"3444",
"4424",
"9240",
"11088",
"18494",
"19740",
"34440",
"31304",
"52808",
"52248",
"74048",
"71120",
"110964",
"94864",
"145222",
"132888",
"181384",
"163856",
"249480",
"201040",
"295960",
"264684",
"346696",
"314272",
"454608",
"352520",
"518336",
"452256",
"591934",
"517216"
] | [
"nonn",
"easy"
] | 15 | 0 | 2 | [
"A008429",
"A008451"
] | null | N. J. A. Sloane | 2018-10-16T07:27:37 | oeisdata/seq/A008/A008429.seq | 373f215797063f43ef54f27da555a7e0 |
A008430 | Theta series of D_8 lattice. | [
"1",
"112",
"1136",
"3136",
"9328",
"14112",
"31808",
"38528",
"74864",
"84784",
"143136",
"149184",
"261184",
"246176",
"390784",
"395136",
"599152",
"550368",
"859952",
"768320",
"1175328",
"1078784",
"1513152",
"1362816",
"2096192",
"1764112",
"2496928",
"2289280",
"3208832",
"2731680",
"4007808",
"3336704"
] | [
"nonn",
"easy"
] | 28 | 0 | 2 | [
"A000143",
"A008427",
"A008430",
"A109773"
] | null | N. J. A. Sloane | 2018-09-30T20:24:13 | oeisdata/seq/A008/A008430.seq | cfdffd101b43b1ee131accea8f193ef8 |
A008431 | Theta series of D_9 lattice. | [
"1",
"144",
"2034",
"7392",
"22608",
"44640",
"93984",
"141120",
"262386",
"343536",
"557280",
"703584",
"1068384",
"1234080",
"1851264",
"2057280",
"2884176",
"3231936",
"4428242",
"4639392",
"6455520",
"6670272",
"8814816",
"9320256",
"12065568",
"12152880",
"16161120",
"16124544",
"20496960",
"20906208",
"26378880",
"25736832"
] | [
"nonn",
"easy"
] | 14 | 0 | 2 | null | null | N. J. A. Sloane | 2018-10-16T08:24:28 | oeisdata/seq/A008/A008431.seq | d1ec8c436077dabd3f94538e0fd7493d |
A008432 | Theta series of D_10 lattice. | [
"1",
"180",
"3380",
"16320",
"52020",
"129064",
"262080",
"489600",
"840500",
"1330420",
"2050344",
"2986560",
"4194240",
"5878440",
"7862400",
"10216320",
"13415220",
"17163880",
"21250420",
"26585280",
"32826664",
"39475200",
"47960640",
"57087360",
"67108800",
"80452188",
"93590440",
"107091840",
"125827200",
"145415080"
] | [
"nonn",
"easy"
] | 11 | 0 | 2 | null | null | N. J. A. Sloane | 2018-10-16T07:58:16 | oeisdata/seq/A008/A008432.seq | 3bfa929f722420c449e45372a3278dda |
A008433 | Theta series of {D_5}^{+} packing. | [
"1",
"0",
"0",
"0",
"0",
"16",
"0",
"0",
"40",
"0",
"0",
"0",
"0",
"80",
"0",
"0",
"90",
"0",
"0",
"0",
"0",
"160",
"0",
"0",
"240",
"0",
"0",
"0",
"0",
"240",
"0",
"0",
"200",
"0",
"0",
"0",
"0",
"400",
"0",
"0",
"560",
"0",
"0",
"0",
"0",
"496",
"0",
"0",
"400",
"0",
"0",
"0",
"0",
"560",
"0",
"0",
"800",
"0",
"0",
"0",
"0",
"880",
"0",
"0",
"730"
] | [
"nonn",
"easy"
] | 33 | 0 | 6 | [
"A000122",
"A002448",
"A005930",
"A008433"
] | null | N. J. A. Sloane | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008433.seq | e6472b184ec6621be849b306cb5bead2 |
A008434 | Theta series of {D_6}^{+} lattice. | [
"1",
"0",
"0",
"32",
"60",
"0",
"0",
"192",
"252",
"0",
"0",
"480",
"544",
"0",
"0",
"832",
"1020",
"0",
"0",
"1440",
"1560",
"0",
"0",
"2112",
"2080",
"0",
"0",
"2624",
"3264",
"0",
"0",
"3840",
"4092",
"0",
"0",
"4992",
"4380",
"0",
"0",
"5440",
"6552",
"0",
"0",
"7392",
"8160",
"0",
"0",
"8832",
"8224"
] | [
"nonn",
"easy"
] | 41 | 0 | 4 | [
"A008434",
"A287329",
"A287944",
"A288488",
"A288489",
"A288776",
"A288779",
"A288909",
"A290654",
"A290655"
] | null | N. J. A. Sloane | 2023-04-24T11:20:41 | oeisdata/seq/A008/A008434.seq | 08439d5231d432c991716840b71f9570 |
A008435 | Theta series of {D_7}^{+} packing. | [
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"64",
"84",
"0",
"0",
"0",
"0",
"0",
"0",
"448",
"574",
"0",
"0",
"0",
"0",
"0",
"0",
"1344",
"1288",
"0",
"0",
"0",
"0",
"0",
"0",
"2688",
"3444",
"0",
"0",
"0",
"0",
"0",
"0",
"4928",
"4424",
"0",
"0",
"0",
"0",
"0",
"0",
"8064",
"9240",
"0",
"0",
"0",
"0",
"0",
"0",
"11200",
"11088",
"0",
"0",
"0"
] | [
"nonn",
"easy"
] | 20 | 0 | 8 | [
"A008429",
"A008435"
] | null | N. J. A. Sloane | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008435.seq | a7eb5b6a08044f3fd70f15d21e75bb18 |
A008436 | Theta series of {D_9}^{+} packing. | [
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"144",
"256",
"0",
"0",
"0",
"0",
"0",
"0",
"2034",
"2304",
"0",
"0",
"0",
"0",
"0",
"0",
"7392",
"9216",
"0",
"0",
"0",
"0",
"0",
"0",
"22608",
"23808",
"0",
"0",
"0",
"0",
"0",
"0",
"44640",
"50688",
"0",
"0",
"0",
"0",
"0",
"0",
"93984",
"96768",
"0",
"0",
"0",
"0",
"0",
"0",
"141120"
] | [
"nonn",
"easy"
] | 27 | 0 | 9 | [
"A000122",
"A002448",
"A008431",
"A008436"
] | null | N. J. A. Sloane | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008436.seq | 020a7d6420a8e0e46dfb8bc9fd05cd0c |
A008437 | Expansion of Jacobi theta constant theta_2^3 /8. | [
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"3",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"3",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"4",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"6",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"3",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"6",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"9",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"3",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"7",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"9",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"6",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"9",
"0",
"0",
"0",
"0",
"0"
] | [
"nonn"
] | 12 | 0 | 12 | [
"A000004",
"A000196",
"A008437",
"A085121",
"A290081"
] | null | N. J. A. Sloane. | 2017-07-24T11:36:46 | oeisdata/seq/A008/A008437.seq | 8b2a25f62f7ae6f2315cd48a630395db |
A008438 | Sum of divisors of 2*n + 1. | [
"1",
"4",
"6",
"8",
"13",
"12",
"14",
"24",
"18",
"20",
"32",
"24",
"31",
"40",
"30",
"32",
"48",
"48",
"38",
"56",
"42",
"44",
"78",
"48",
"57",
"72",
"54",
"72",
"80",
"60",
"62",
"104",
"84",
"68",
"96",
"72",
"74",
"124",
"96",
"80",
"121",
"84",
"108",
"120",
"90",
"112",
"128",
"120",
"98",
"156",
"102",
"104",
"192",
"108",
"110",
"152",
"114",
"144",
"182",
"144",
"133",
"168"
] | [
"nonn",
"easy",
"nice"
] | 140 | 0 | 2 | [
"A000118",
"A000203",
"A000593",
"A002131",
"A005408",
"A005879",
"A007331",
"A008438",
"A008439",
"A008440",
"A008441",
"A008443",
"A010054",
"A014787",
"A014809",
"A062731",
"A096727",
"A099774",
"A115607",
"A125061",
"A129588",
"A138741",
"A225699",
"A225700",
"A226252",
"A226253",
"A226254",
"A226255"
] | null | N. J. A. Sloane | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008438.seq | 57eb33ce02f67afc4c9aa22ad46e7ebd |
A008439 | Expansion of Jacobi theta constant theta_2^5 /32. | [
"1",
"5",
"10",
"15",
"25",
"31",
"35",
"55",
"60",
"60",
"90",
"90",
"95",
"135",
"125",
"126",
"170",
"180",
"175",
"215",
"220",
"195",
"285",
"280",
"245",
"340",
"300",
"320",
"405",
"350",
"351",
"450",
"465",
"415",
"515",
"480",
"425",
"620",
"590",
"505",
"655",
"625",
"590",
"755",
"660",
"650",
"805",
"770",
"755",
"855",
"841",
"730",
"1045",
"960",
"770",
"1100"
] | [
"nonn"
] | 31 | 0 | 2 | [
"A007331",
"A008438",
"A008439",
"A008440",
"A008441",
"A008443",
"A010054",
"A014787",
"A014809",
"A226252",
"A226253",
"A226254",
"A226255"
] | null | N. J. A. Sloane | 2017-08-02T10:22:45 | oeisdata/seq/A008/A008439.seq | 76afe1041717165dc2a61846570bc932 |
A008440 | Expansion of Jacobi theta constant theta_2^6 /(64q^(3/2)). | [
"1",
"6",
"15",
"26",
"45",
"66",
"82",
"120",
"156",
"170",
"231",
"276",
"290",
"390",
"435",
"438",
"561",
"630",
"651",
"780",
"861",
"842",
"1020",
"1170",
"1095",
"1326",
"1431",
"1370",
"1716",
"1740",
"1682",
"2016",
"2145",
"2132",
"2415",
"2550",
"2353",
"2850",
"3120",
"2810",
"3321",
"3486",
"3285",
"3906",
"4005",
"3722",
"4350"
] | [
"nonn",
"easy"
] | 52 | 0 | 2 | [
"A002173",
"A007331",
"A008438",
"A008439",
"A008440",
"A008441",
"A008443",
"A010054",
"A014787",
"A014809",
"A226252",
"A226253",
"A226254",
"A226255"
] | null | N. J. A. Sloane | 2019-06-25T09:48:31 | oeisdata/seq/A008/A008440.seq | cd88a0f889f86dc2cc8af64a04592cb7 |
A008441 | Number of ways of writing n as the sum of 2 triangular numbers. | [
"1",
"2",
"1",
"2",
"2",
"0",
"3",
"2",
"0",
"2",
"2",
"2",
"1",
"2",
"0",
"2",
"4",
"0",
"2",
"0",
"1",
"4",
"2",
"0",
"2",
"2",
"0",
"2",
"2",
"2",
"1",
"4",
"0",
"0",
"2",
"0",
"4",
"2",
"2",
"2",
"0",
"0",
"3",
"2",
"0",
"2",
"4",
"0",
"2",
"2",
"0",
"4",
"0",
"0",
"0",
"4",
"3",
"2",
"2",
"0",
"2",
"2",
"0",
"0",
"2",
"2",
"4",
"2",
"0",
"2",
"2",
"0",
"3",
"2",
"0",
"0",
"4",
"0",
"2",
"2",
"0",
"6",
"0",
"2",
"2",
"0",
"0",
"2",
"2",
"0",
"1",
"4",
"2",
"2",
"4",
"0",
"0",
"2",
"0",
"2",
"2",
"2",
"2",
"0",
"0"
] | [
"nonn",
"easy"
] | 185 | 0 | 2 | [
"A000217",
"A001826",
"A001842",
"A001938",
"A002175",
"A002654",
"A004018",
"A004020",
"A005883",
"A007331",
"A008438",
"A008439",
"A008440",
"A008441",
"A008442",
"A008443",
"A010054",
"A014787",
"A014809",
"A019669",
"A035154",
"A035181",
"A035184",
"A052343",
"A053692",
"A079006",
"A104794",
"A112301",
"A113406",
"A113407",
"A113414",
"A113446",
"A113652",
"A121444",
"A199015",
"A226252",
"A226253",
"A226254",
"A226255",
"A274621"
] | null | N. J. A. Sloane | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008441.seq | d2c4d13a7cba8ed0d16a1e3501fb8660 |
A008442 | Expansion of Jacobi theta constant (theta_2(2z))^2/4. | [
"1",
"0",
"0",
"0",
"2",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"2",
"0",
"0",
"0",
"2",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"3",
"0",
"0",
"0",
"2",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"2",
"0",
"0",
"0",
"2",
"0",
"0",
"0",
"2",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"2",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"2",
"0",
"0",
"0",
"4",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"2",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"1",
"0",
"0",
"0",
"4",
"0",
"0",
"0",
"2",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"2",
"0",
"0",
"0",
"2",
"0",
"0",
"0",
"0"
] | [
"nonn",
"mult"
] | 51 | 1 | 5 | [
"A008441",
"A008442",
"A019675",
"A290081"
] | null | N. J. A. Sloane | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008442.seq | b4c7863b0967ce9f7db065f9e7f8b128 |
A008443 | Number of ordered ways of writing n as the sum of 3 triangular numbers. | [
"1",
"3",
"3",
"4",
"6",
"3",
"6",
"9",
"3",
"7",
"9",
"6",
"9",
"9",
"6",
"6",
"15",
"9",
"7",
"12",
"3",
"15",
"15",
"6",
"12",
"12",
"9",
"12",
"15",
"6",
"13",
"21",
"12",
"6",
"15",
"9",
"12",
"24",
"9",
"18",
"12",
"9",
"18",
"15",
"12",
"13",
"24",
"9",
"15",
"24",
"6",
"18",
"27",
"6",
"12",
"15",
"18",
"24",
"21",
"15",
"12",
"27",
"9",
"13",
"18",
"15",
"27",
"27",
"9",
"12",
"27",
"15",
"24",
"21",
"12",
"15",
"30",
"15",
"12"
] | [
"nonn",
"easy",
"look",
"nice"
] | 98 | 0 | 2 | [
"A002636",
"A005869",
"A005875",
"A005878",
"A005886",
"A007331",
"A008438",
"A008439",
"A008440",
"A008441",
"A008443",
"A010054",
"A014787",
"A014809",
"A038835",
"A053604",
"A226252",
"A226253",
"A226254",
"A226255",
"A290733",
"A290740"
] | null | N. J. A. Sloane | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008443.seq | 797760f4d3a8e967d305c6a68333ba6c |
A008444 | Theta series of A_4 lattice. | [
"1",
"20",
"30",
"60",
"60",
"120",
"40",
"180",
"150",
"140",
"130",
"240",
"180",
"360",
"120",
"260",
"220",
"480",
"210",
"400",
"360",
"240",
"360",
"660",
"200",
"620",
"240",
"600",
"540",
"600",
"240",
"640",
"630",
"720",
"320",
"780",
"420",
"1080",
"600",
"480",
"650",
"840",
"360",
"1260",
"720",
"840",
"440",
"1380",
"660",
"860",
"630",
"640",
"1080",
"1560",
"400"
] | [
"nonn",
"nice"
] | 43 | 0 | 2 | [
"A000007",
"A000122",
"A004015",
"A004016",
"A008444",
"A008445",
"A008446",
"A008447",
"A008448",
"A008449"
] | null | N. J. A. Sloane | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008444.seq | b9bf05f76b26e390ea61c5e1799e715f |
A008445 | Theta series of A_5 lattice. | [
"1",
"30",
"90",
"140",
"270",
"360",
"330",
"660",
"810",
"570",
"1020",
"1260",
"1100",
"1560",
"1620",
"1452",
"2190",
"2340",
"1710",
"2940",
"3240",
"1920",
"3360",
"3960",
"2970",
"3930",
"4140",
"3920",
"5460",
"4680",
"3360",
"5940",
"6570",
"4620",
"6180",
"7560",
"5130",
"7320",
"7920",
"5280",
"9180",
"8100",
"6600",
"10500",
"9900"
] | [
"nonn"
] | 25 | 0 | 2 | null | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008445.seq | fe4b82b9596302290f5ee2db9de110f5 |
A008446 | Theta series of A_6 lattice. | [
"1",
"42",
"210",
"350",
"882",
"1050",
"1750",
"2100",
"3570",
"3066",
"5250",
"5124",
"7350",
"7350",
"10500",
"8064",
"14322",
"12600",
"15330",
"15750",
"22050",
"16814",
"25620",
"22260",
"29750",
"25242",
"36750",
"28700",
"44100",
"35364",
"40320",
"42000",
"57330",
"42700",
"63000",
"50442",
"64386",
"57540",
"78750",
"56448"
] | [
"nonn",
"easy",
"nice"
] | 14 | 0 | 2 | null | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008446.seq | 5a361ef473e91539ecfd46c586432e5d |
A008447 | Theta series of A_7 lattice. | [
"1",
"56",
"420",
"896",
"2366",
"3360",
"6440",
"7168",
"14196",
"14168",
"22120",
"24192",
"37912",
"33824",
"55440",
"50176",
"75838",
"71232",
"98700",
"88704",
"141960",
"117824",
"156520",
"150528",
"217672",
"173656",
"261240",
"218624",
"303424",
"273504",
"355600",
"301056",
"455028",
"359744",
"474320"
] | [
"nonn"
] | 13 | 0 | 2 | [
"A008447",
"A023919"
] | null | N. J. A. Sloane. | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008447.seq | 41be4b62d93a9a7c915075cba1f08853 |
A008448 | Theta series of A_8 lattice. | [
"1",
"72",
"756",
"2184",
"5742",
"10584",
"19656",
"26712",
"49140",
"59208",
"88452",
"111888",
"159432",
"171864",
"260064",
"275184",
"364734",
"412776",
"532872",
"534744",
"772632",
"751296",
"935064",
"1022112",
"1277640",
"1229328",
"1661688",
"1598856",
"1959696",
"2048760",
"2476656",
"2321928"
] | [
"nonn"
] | 10 | 0 | 2 | null | null | N. J. A. Sloane. | 2019-06-12T20:48:10 | oeisdata/seq/A008/A008448.seq | d6183d41e14ca58c668dab4d36f80ee9 |
A008449 | Theta series of A_9 lattice. | [
"1",
"90",
"1260",
"4920",
"13320",
"30492",
"55860",
"94680",
"156240",
"232770",
"332640",
"471240",
"636480",
"835020",
"1098900",
"1391040",
"1720800",
"2181780",
"2614260",
"3118680",
"3889962",
"4519140",
"5207760",
"6237000",
"7208640",
"8274510",
"9585000",
"10816560",
"12215520",
"14153760"
] | [
"nonn"
] | 10 | 0 | 2 | null | null | N. J. A. Sloane. | 2019-06-12T20:47:59 | oeisdata/seq/A008/A008449.seq | 08472de660374bba0bd298be46b2e66e |
A008450 | Theta series of A_10 lattice. | [
"1",
"110",
"1980",
"10230",
"30140",
"79992",
"155100",
"302280",
"487080",
"839630",
"1188660",
"1845360",
"2494470",
"3610200",
"4548060",
"6490374",
"7786790",
"10545480",
"12579600",
"16461720",
"19071162",
"24859560",
"27742440",
"35347950",
"39926040",
"49393014",
"54115380",
"67987150"
] | [
"nonn"
] | 10 | 0 | 2 | null | null | N. J. A. Sloane. | 2019-06-12T20:47:39 | oeisdata/seq/A008/A008450.seq | 65f71ab40b2c0eb91915491cac863a2d |
A008451 | Number of ways of writing n as a sum of 7 squares. | [
"1",
"14",
"84",
"280",
"574",
"840",
"1288",
"2368",
"3444",
"3542",
"4424",
"7560",
"9240",
"8456",
"11088",
"16576",
"18494",
"17808",
"19740",
"27720",
"34440",
"29456",
"31304",
"49728",
"52808",
"43414",
"52248",
"68320",
"74048",
"68376",
"71120",
"99456",
"110964",
"89936",
"94864",
"136080",
"145222"
] | [
"nonn"
] | 59 | 0 | 2 | [
"A008451",
"A122141",
"A286815",
"A319574"
] | null | N. J. A. Sloane | 2024-06-23T02:21:56 | oeisdata/seq/A008/A008451.seq | 172a8afa6fa0a8936a8319b19790534c |
A008452 | Number of ways of writing n as a sum of 9 squares. | [
"1",
"18",
"144",
"672",
"2034",
"4320",
"7392",
"12672",
"22608",
"34802",
"44640",
"60768",
"93984",
"125280",
"141120",
"182400",
"262386",
"317376",
"343536",
"421344",
"557280",
"665280",
"703584",
"800640",
"1068384",
"1256562",
"1234080",
"1421184",
"1851264",
"2034720",
"2057280",
"2338560"
] | [
"nonn"
] | 44 | 0 | 2 | [
"A008431",
"A008452",
"A122141",
"A286815",
"A319574"
] | null | N. J. A. Sloane | 2024-06-23T02:23:36 | oeisdata/seq/A008/A008452.seq | 8095e5ffca182eb7b541eb793838ff85 |
A008453 | Number of ways of writing n as a sum of 11 squares. | [
"1",
"22",
"220",
"1320",
"5302",
"15224",
"33528",
"63360",
"116380",
"209550",
"339064",
"491768",
"719400",
"1095160",
"1538416",
"1964160",
"2624182",
"3696880",
"4763220",
"5686648",
"7217144",
"9528816",
"11676280",
"13495680",
"16317048",
"20787470",
"25022184",
"27785120",
"32503680"
] | [
"nonn"
] | 40 | 0 | 2 | [
"A008453",
"A022042",
"A122141",
"A286815",
"A319574"
] | null | N. J. A. Sloane | 2021-12-27T21:26:40 | oeisdata/seq/A008/A008453.seq | 7eb8f41cb4463943ed58c01e9d1bc465 |
A008454 | Tenth powers: a(n) = n^10. | [
"0",
"1",
"1024",
"59049",
"1048576",
"9765625",
"60466176",
"282475249",
"1073741824",
"3486784401",
"10000000000",
"25937424601",
"61917364224",
"137858491849",
"289254654976",
"576650390625",
"1099511627776",
"2015993900449",
"3570467226624",
"6131066257801",
"10240000000000",
"16679880978201",
"26559922791424"
] | [
"nonn",
"easy",
"mult"
] | 43 | 0 | 3 | [
"A000290",
"A000584",
"A008454",
"A013668",
"A123867"
] | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008454.seq | a1c93ec0d835a800b9524054cbf3bc17 |
A008455 | 11th powers: a(n) = n^11. | [
"0",
"1",
"2048",
"177147",
"4194304",
"48828125",
"362797056",
"1977326743",
"8589934592",
"31381059609",
"100000000000",
"285311670611",
"743008370688",
"1792160394037",
"4049565169664",
"8649755859375",
"17592186044416",
"34271896307633",
"64268410079232",
"116490258898219",
"204800000000000"
] | [
"nonn",
"easy",
"mult"
] | 34 | 0 | 3 | [
"A000583",
"A000584",
"A001014",
"A001017",
"A008454",
"A008455",
"A013669"
] | null | N. J. A. Sloane. | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008455.seq | 1c94bcef49220e7778462e750a5a3bc3 |
A008456 | 12th powers: a(n) = n^12. | [
"0",
"1",
"4096",
"531441",
"16777216",
"244140625",
"2176782336",
"13841287201",
"68719476736",
"282429536481",
"1000000000000",
"3138428376721",
"8916100448256",
"23298085122481",
"56693912375296",
"129746337890625",
"281474976710656",
"582622237229761"
] | [
"nonn",
"easy",
"mult"
] | 42 | 0 | 3 | [
"A000290",
"A000578",
"A000583",
"A001014",
"A008456",
"A013670",
"A123868"
] | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008456.seq | 924500b936b7dccd739df7c991e689b7 |
A008457 | a(n) = Sum_{ d >= 1, d divides n} (-1)^(n-d)*d^3. | [
"1",
"7",
"28",
"71",
"126",
"196",
"344",
"583",
"757",
"882",
"1332",
"1988",
"2198",
"2408",
"3528",
"4679",
"4914",
"5299",
"6860",
"8946",
"9632",
"9324",
"12168",
"16324",
"15751",
"15386",
"20440",
"24424",
"24390",
"24696",
"29792",
"37447",
"37296",
"34398",
"43344",
"53747",
"50654",
"48020",
"61544",
"73458"
] | [
"nonn",
"mult",
"easy"
] | 68 | 1 | 2 | [
"A000143",
"A001158",
"A002129",
"A008457",
"A048272",
"A051000",
"A064027",
"A138503"
] | null | N. J. A. Sloane | 2024-06-21T15:37:56 | oeisdata/seq/A008/A008457.seq | 932c900d6f4b52b9d8abe29844a85521 |
A008458 | Coordination sequence for hexagonal lattice. | [
"1",
"6",
"12",
"18",
"24",
"30",
"36",
"42",
"48",
"54",
"60",
"66",
"72",
"78",
"84",
"90",
"96",
"102",
"108",
"114",
"120",
"126",
"132",
"138",
"144",
"150",
"156",
"162",
"168",
"174",
"180",
"186",
"192",
"198",
"204",
"210",
"216",
"222",
"228",
"234",
"240",
"246",
"252",
"258",
"264",
"270",
"276",
"282",
"288",
"294",
"300",
"306",
"312",
"318",
"324",
"330",
"336",
"342",
"348"
] | [
"nonn",
"easy",
"nice"
] | 106 | 0 | 2 | [
"A008458",
"A008486",
"A008574",
"A008576",
"A008579",
"A008588",
"A008706",
"A019557",
"A022144",
"A032528",
"A048477",
"A072154",
"A219529",
"A234275",
"A250120",
"A250122",
"A296368",
"A298014",
"A298015",
"A298016",
"A298022",
"A298024",
"A298026",
"A298028",
"A298029",
"A298031",
"A298033",
"A298035",
"A298036",
"A298038",
"A298040"
] | null | N. J. A. Sloane | 2024-01-12T06:08:30 | oeisdata/seq/A008/A008458.seq | de59cdd6e1c4d5c8548e777fb2078334 |
A008459 | Square the entries of Pascal's triangle. | [
"1",
"1",
"1",
"1",
"4",
"1",
"1",
"9",
"9",
"1",
"1",
"16",
"36",
"16",
"1",
"1",
"25",
"100",
"100",
"25",
"1",
"1",
"36",
"225",
"400",
"225",
"36",
"1",
"1",
"49",
"441",
"1225",
"1225",
"441",
"49",
"1",
"1",
"64",
"784",
"3136",
"4900",
"3136",
"784",
"64",
"1",
"1",
"81",
"1296",
"7056",
"15876",
"15876",
"7056",
"1296",
"81",
"1",
"1",
"100",
"2025",
"14400",
"44100",
"63504",
"44100",
"14400",
"2025",
"100",
"1"
] | [
"nonn",
"tabl",
"easy",
"changed"
] | 231 | 0 | 5 | [
"A000012",
"A000290",
"A000537",
"A000984",
"A001249",
"A001263",
"A007318",
"A008459",
"A055133",
"A062145",
"A062190",
"A062196",
"A062264",
"A063007",
"A086645",
"A093118",
"A105868",
"A108558",
"A108625",
"A116647",
"A132813",
"A145903",
"A181543"
] | null | N. J. A. Sloane | 2025-04-16T19:38:49 | oeisdata/seq/A008/A008459.seq | 958da56ee245065976af99d7bbd9e6d0 |
A008460 | Take sum of squares of digits of previous term; start with 6. | [
"6",
"36",
"45",
"41",
"17",
"50",
"25",
"29",
"85",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4"
] | [
"nonn",
"base",
"easy"
] | 31 | 1 | 1 | [
"A000216",
"A000218",
"A000221",
"A003132",
"A003621",
"A007770",
"A008460",
"A008462",
"A008463",
"A031176",
"A039943",
"A080709",
"A099645",
"A122065",
"A139566"
] | null | N. J. A. Sloane | 2022-10-21T22:07:45 | oeisdata/seq/A008/A008460.seq | ab0fd93d70e73e5bf16fc78d47a2e738 |
A008461 | Take sum of squares of digits of previous term. | [
"7",
"49",
"97",
"130",
"10",
"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",
"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"
] | [
"nonn",
"base"
] | 9 | 1 | 1 | null | null | N. J. A. Sloane. | 2015-08-25T10:31:46 | oeisdata/seq/A008/A008461.seq | ecd0c742cb2606291e58bcf4cfdd4ebd |
A008462 | Take sum of squares of digits of previous term; start with 8. | [
"8",
"64",
"52",
"29",
"85",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145"
] | [
"nonn",
"base",
"easy"
] | 38 | 1 | 1 | [
"A000216",
"A000218",
"A000221",
"A003132",
"A003621",
"A007770",
"A008460",
"A008462",
"A008463",
"A031176",
"A039943",
"A080709",
"A099645",
"A122065",
"A139566"
] | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008462.seq | 76c1c2d6fa4ed83624c36af8e288d690 |
A008463 | Take sum of squares of digits of previous term; start with 9. | [
"9",
"81",
"65",
"61",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145",
"42",
"20",
"4",
"16",
"37",
"58",
"89",
"145"
] | [
"nonn",
"base",
"easy"
] | 29 | 1 | 1 | [
"A000216",
"A000218",
"A000221",
"A003132",
"A003621",
"A007770",
"A008460",
"A008462",
"A008463",
"A031176",
"A039943",
"A080709",
"A099645",
"A122065",
"A139566"
] | null | N. J. A. Sloane | 2022-10-21T22:00:17 | oeisdata/seq/A008/A008463.seq | 5274c9607fa5ebddf9f09a5fd5ffdd48 |
A008464 | a(n) = 2^(2n+3) - 2^n*(n+3). | [
"1",
"5",
"24",
"108",
"464",
"1936",
"7936",
"32192",
"129792",
"521472",
"2091008",
"8375296",
"33525760",
"134156288",
"536739840",
"2147205120",
"8589344768",
"34358493184",
"137436332032",
"549750308864",
"2199011721216",
"8796068904960",
"35184321757184",
"140737383497728",
"562949735317504"
] | [
"nonn",
"easy"
] | 37 | -1 | 2 | null | null | N. J. A. Sloane | 2023-04-10T12:50:24 | oeisdata/seq/A008/A008464.seq | 95c8492c9f57dfd6b78ba6c6123126a8 |
A008465 | 2^(2n-6) * C(n,3) - 2^(n-2) * C(n,4). | [
"1",
"12",
"120",
"1040",
"7840",
"52864",
"327936",
"1912320",
"10644480",
"57164800",
"298428416",
"1522626560",
"7622451200",
"37551144960",
"182458122240",
"875972788224",
"4161315274752",
"19583780782080",
"91393766195200"
] | [
"nonn"
] | 10 | 3 | 2 | null | null | N. J. A. Sloane, Colin Mallows | 2016-10-12T13:10:37 | oeisdata/seq/A008/A008465.seq | c63721b44992b9f85889f800ca835f66 |
A008466 | a(n) = 2^n - Fibonacci(n+2). | [
"0",
"0",
"1",
"3",
"8",
"19",
"43",
"94",
"201",
"423",
"880",
"1815",
"3719",
"7582",
"15397",
"31171",
"62952",
"126891",
"255379",
"513342",
"1030865",
"2068495",
"4147936",
"8313583",
"16655823",
"33358014",
"66791053",
"133703499",
"267603416",
"535524643",
"1071563515",
"2143959070",
"4289264409",
"8580707127"
] | [
"nonn",
"nice",
"easy",
"changed"
] | 143 | 0 | 4 | [
"A008466",
"A050227",
"A050231",
"A050232",
"A050233",
"A056986",
"A153281",
"A186244",
"A335455",
"A335457",
"A335458",
"A335516",
"A340156"
] | null | N. J. A. Sloane, I. J. Kennedy, Eric W. Weisstein | 2025-04-23T14:50:38 | oeisdata/seq/A008/A008466.seq | 8116423bf3e961119e7211c3fd8bed5e |
A008467 | a(n) = n OR n^2 (applied to ternary expansions). | [
"1",
"5",
"12",
"16",
"26",
"42",
"52",
"71",
"90",
"100",
"122",
"147",
"178",
"206",
"231",
"259",
"296",
"342",
"370",
"401",
"453",
"484",
"539",
"591",
"646",
"701",
"756",
"784",
"842",
"930",
"961",
"1025",
"1095",
"1186",
"1259",
"1332",
"1369",
"1445",
"1524",
"1609",
"1691",
"1770",
"1852",
"1943",
"2070",
"2152",
"2237",
"2316",
"2401",
"2510"
] | [
"base",
"nonn",
"easy"
] | 23 | 1 | 2 | [
"A007745",
"A008467",
"A008468",
"A008469"
] | null | Olivier Gérard | 2018-03-29T18:21:03 | oeisdata/seq/A008/A008467.seq | 0c8de6d90f985b92177fa2713e7dfaf8 |
A008468 | a(n) = n OR n^3 (applied to binary expansions). | [
"1",
"10",
"27",
"68",
"125",
"222",
"343",
"520",
"729",
"1002",
"1339",
"1740",
"2205",
"2750",
"3375",
"4112",
"4913",
"5850",
"6875",
"8020",
"9277",
"10654",
"12183",
"13848",
"15641",
"17594",
"19707",
"21980",
"24413",
"27006",
"29791",
"32800",
"35937",
"39338",
"42875",
"46692",
"50685",
"54910",
"59319",
"64040"
] | [
"base",
"nonn",
"easy"
] | 27 | 1 | 2 | [
"A007745",
"A008467",
"A008468",
"A008469"
] | null | Olivier Gérard | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008468.seq | dd0632cabe6ff1195715f62fbcaae7da |
A008469 | a(n) = n OR n^3 (applied to ternary expansions). | [
"1",
"8",
"30",
"67",
"125",
"222",
"349",
"512",
"738",
"1009",
"1340",
"1740",
"2200",
"2744",
"3390",
"4102",
"4913",
"5850",
"6877",
"8018",
"9282",
"10660",
"12176",
"13848",
"15631",
"17576",
"19710",
"21979",
"24416",
"27003",
"29794",
"32768",
"35943",
"39337",
"42902",
"46692",
"50662",
"54881",
"59331",
"64030",
"68921"
] | [
"base",
"nonn",
"easy"
] | 19 | 1 | 2 | [
"A007745",
"A008467",
"A008468",
"A008469"
] | null | Olivier Gérard | 2018-03-29T18:18:55 | oeisdata/seq/A008/A008469.seq | 27644c043178405919b378c1ef77b699 |
A008470 | At least 3 out of 10m+1, 10m+3, 10m+7, 10m+9 are primes. | [
"1",
"4",
"7",
"10",
"13",
"19",
"22",
"31",
"43",
"46",
"61",
"64",
"82",
"85",
"88",
"103",
"106",
"109",
"130",
"142",
"145",
"148",
"160",
"166",
"169",
"178",
"187",
"199",
"208",
"238",
"268",
"271",
"316",
"325",
"346",
"367",
"376",
"391",
"400",
"409",
"415",
"421",
"451",
"472",
"478",
"493",
"523",
"541",
"544",
"547",
"550",
"565",
"574",
"586",
"670",
"682"
] | [
"nonn"
] | 26 | 1 | 2 | null | null | Olivier Gérard | 2021-09-12T16:25:08 | oeisdata/seq/A008/A008470.seq | 50632be593d86bd30f11b5f3b66c03db |
A008471 | Exactly 3 out of 10m+1, 10m+3, 10m+7, 10m+9 are primes. | [
"4",
"7",
"13",
"22",
"31",
"43",
"46",
"61",
"64",
"85",
"88",
"103",
"106",
"109",
"130",
"142",
"145",
"160",
"166",
"169",
"178",
"199",
"238",
"268",
"271",
"316",
"367",
"376",
"391",
"400",
"409",
"415",
"421",
"451",
"472",
"478",
"493",
"523",
"541",
"544",
"547",
"550",
"574"
] | [
"nonn"
] | 27 | 1 | 1 | [
"A007811",
"A008471",
"A032352",
"A216292",
"A216293"
] | null | Olivier Gérard | 2023-11-03T11:02:23 | oeisdata/seq/A008/A008471.seq | 468ba7b724a65eaf50ae6452289e0504 |
A008472 | Sum of the distinct primes dividing n. | [
"0",
"2",
"3",
"2",
"5",
"5",
"7",
"2",
"3",
"7",
"11",
"5",
"13",
"9",
"8",
"2",
"17",
"5",
"19",
"7",
"10",
"13",
"23",
"5",
"5",
"15",
"3",
"9",
"29",
"10",
"31",
"2",
"14",
"19",
"12",
"5",
"37",
"21",
"16",
"7",
"41",
"12",
"43",
"13",
"8",
"25",
"47",
"5",
"7",
"7",
"20",
"15",
"53",
"5",
"16",
"9",
"22",
"31",
"59",
"10",
"61",
"33",
"10",
"2",
"18",
"16",
"67",
"19",
"26",
"14",
"71",
"5",
"73"
] | [
"nonn",
"nice",
"easy"
] | 143 | 1 | 2 | [
"A001221",
"A001222",
"A001414",
"A005063",
"A005064",
"A005065",
"A008472",
"A010051",
"A024924",
"A051731",
"A061397",
"A064502",
"A085020",
"A143535",
"A351193",
"A351194",
"A351195",
"A351197",
"A351198"
] | null | Olivier Gérard | 2024-06-22T19:12:39 | oeisdata/seq/A008/A008472.seq | b3d96a1f1c697a83c3c22c4d385dd773 |
A008473 | If n = Product (p_j^k_j) then a(n) = Product (p_j + k_j). | [
"1",
"3",
"4",
"4",
"6",
"12",
"8",
"5",
"5",
"18",
"12",
"16",
"14",
"24",
"24",
"6",
"18",
"15",
"20",
"24",
"32",
"36",
"24",
"20",
"7",
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"6",
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"72",
"32",
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"48",
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"20",
"38",
"60",
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"96",
"44",
"48",
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"18",
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"40",
"80",
"90",
"60",
"96",
"62",
"96",
"40",
"8",
"84",
"144",
"68",
"72",
"96",
"144",
"72",
"25",
"74",
"114"
] | [
"nonn",
"mult"
] | 49 | 1 | 2 | [
"A000203",
"A001221",
"A008473",
"A027748",
"A055231",
"A124010",
"A203908",
"A322965",
"A322966"
] | null | Olivier Gérard | 2022-12-08T07:36:30 | oeisdata/seq/A008/A008473.seq | 1736b7e92b3d0a2ace4f1c9bef339f7b |
A008474 | If n = Product (p_j^k_j) then a(n) = Sum (p_j + k_j). | [
"0",
"3",
"4",
"4",
"6",
"7",
"8",
"5",
"5",
"9",
"12",
"8",
"14",
"11",
"10",
"6",
"18",
"8",
"20",
"10",
"12",
"15",
"24",
"9",
"7",
"17",
"6",
"12",
"30",
"13",
"32",
"7",
"16",
"21",
"14",
"9",
"38",
"23",
"18",
"11",
"42",
"15",
"44",
"16",
"11",
"27",
"48",
"10",
"9",
"10",
"22",
"18",
"54",
"9",
"18",
"13",
"24",
"33",
"60",
"14",
"62",
"35",
"13",
"8",
"20",
"19",
"68",
"22",
"28",
"17",
"72",
"10",
"74",
"41",
"11",
"24",
"20",
"21"
] | [
"nonn"
] | 55 | 1 | 2 | [
"A000026",
"A008474",
"A027748",
"A107737",
"A107738",
"A124010",
"A250030"
] | null | Olivier Gérard | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008474.seq | 93e061a0ff81dd02c469a4d75298af68 |
A008475 | If n = Product (p_j^k_j) then a(n) = Sum (p_j^k_j) (a(1) = 0 by convention). | [
"0",
"2",
"3",
"4",
"5",
"5",
"7",
"8",
"9",
"7",
"11",
"7",
"13",
"9",
"8",
"16",
"17",
"11",
"19",
"9",
"10",
"13",
"23",
"11",
"25",
"15",
"27",
"11",
"29",
"10",
"31",
"32",
"14",
"19",
"12",
"13",
"37",
"21",
"16",
"13",
"41",
"12",
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"15",
"14",
"25",
"47",
"19",
"49",
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"53",
"29",
"16",
"15",
"22",
"31",
"59",
"12",
"61",
"33",
"16",
"64",
"18",
"16",
"67",
"21",
"26",
"14",
"71",
"17",
"73"
] | [
"nonn",
"nice"
] | 76 | 1 | 2 | [
"A000961",
"A001221",
"A001414",
"A005117",
"A008475",
"A023888",
"A027748",
"A028233",
"A034684",
"A051613",
"A053585",
"A072691",
"A078771",
"A081402",
"A081403",
"A081404",
"A092509",
"A124010",
"A159077",
"A222416",
"A286875"
] | null | Olivier Gérard | 2023-10-30T07:15:03 | oeisdata/seq/A008/A008475.seq | d39604f635278d158514ac194a0e488f |
A008476 | If n = Product (p_j^k_j) then a(n) = Sum (k_j^p_j). | [
"0",
"1",
"1",
"4",
"1",
"2",
"1",
"9",
"8",
"2",
"1",
"5",
"1",
"2",
"2",
"16",
"1",
"9",
"1",
"5",
"2",
"2",
"1",
"10",
"32",
"2",
"27",
"5",
"1",
"3",
"1",
"25",
"2",
"2",
"2",
"12",
"1",
"2",
"2",
"10",
"1",
"3",
"1",
"5",
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"2",
"1",
"17",
"128",
"33",
"2",
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"1",
"28",
"2",
"10",
"2",
"2",
"1",
"6",
"1",
"2",
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"36",
"2",
"3",
"1",
"5",
"2",
"3",
"1",
"17",
"1",
"2",
"33",
"5",
"2",
"3",
"1",
"17",
"64",
"2",
"1",
"6",
"2",
"2",
"2",
"10",
"1",
"10",
"2",
"5",
"2",
"2",
"2",
"26"
] | [
"nonn"
] | 26 | 1 | 4 | null | null | Olivier Gérard | 2019-01-07T02:19:38 | oeisdata/seq/A008/A008476.seq | 65ce55098544634dcdef526e388c3d81 |
A008477 | If n = Product (p_j^k_j) then a(n) = Product (k_j^p_j). | [
"1",
"1",
"1",
"4",
"1",
"1",
"1",
"9",
"8",
"1",
"1",
"4",
"1",
"1",
"1",
"16",
"1",
"8",
"1",
"4",
"1",
"1",
"1",
"9",
"32",
"1",
"27",
"4",
"1",
"1",
"1",
"25",
"1",
"1",
"1",
"32",
"1",
"1",
"1",
"9",
"1",
"1",
"1",
"4",
"8",
"1",
"1",
"16",
"128",
"32",
"1",
"4",
"1",
"27",
"1",
"9",
"1",
"1",
"1",
"4",
"1",
"1",
"8",
"36",
"1",
"1",
"1",
"4",
"1",
"1",
"1",
"72",
"1"
] | [
"nonn",
"mult"
] | 87 | 1 | 4 | [
"A001694",
"A005117",
"A008477",
"A008478",
"A010052",
"A013929",
"A027748",
"A062307",
"A122132",
"A124010",
"A342551"
] | null | Olivier Gérard | 2024-02-16T18:36:59 | oeisdata/seq/A008/A008477.seq | 39d8a6e4b6b320d954a4728b686bb928 |
A008478 | Integers of the form Product p_j^k_j = Product k_j^p_j; p_j in A000040. | [
"1",
"4",
"16",
"27",
"72",
"108",
"432",
"800",
"3125",
"6272",
"12500",
"21600",
"30375",
"50000",
"84375",
"121500",
"169344",
"225000",
"247808",
"337500",
"486000",
"750141",
"823543",
"1350000",
"1384448",
"3000564",
"3294172",
"6690816",
"12002256",
"13176688",
"19600000",
"22235661",
"37380096",
"37879808",
"59295096",
"88942644"
] | [
"nonn"
] | 30 | 1 | 2 | [
"A000040",
"A008477",
"A008478",
"A048102",
"A051674",
"A082949"
] | null | Olivier Gérard | 2021-03-29T15:03:15 | oeisdata/seq/A008/A008478.seq | 480af190700fa6612604fbd815e0596f |
A008479 | Number of numbers <= n with same prime factors as n. | [
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"3",
"2",
"1",
"1",
"2",
"1",
"1",
"1",
"4",
"1",
"3",
"1",
"2",
"1",
"1",
"1",
"4",
"2",
"1",
"3",
"2",
"1",
"1",
"1",
"5",
"1",
"1",
"1",
"5",
"1",
"1",
"1",
"3",
"1",
"1",
"1",
"2",
"2",
"1",
"1",
"6",
"2",
"4",
"1",
"2",
"1",
"7",
"1",
"3",
"1",
"1",
"1",
"2",
"1",
"1",
"2",
"6",
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"8",
"1",
"1",
"3",
"2",
"1",
"1",
"1",
"5",
"4",
"1",
"1",
"2",
"1",
"1",
"1",
"3",
"1",
"3",
"1",
"2",
"1",
"1",
"1",
"9"
] | [
"nonn",
"easy"
] | 30 | 1 | 4 | [
"A005117",
"A005361",
"A007947",
"A008479",
"A008683",
"A284311",
"A284457",
"A285321",
"A285328",
"A285329"
] | null | Jeffrey Shallit, Olivier Gérard | 2017-10-19T10:53:38 | oeisdata/seq/A008/A008479.seq | 838830b44da7a6eef49f8410e9e6324a |
A008480 | Number of ordered prime factorizations of n. | [
"1",
"1",
"1",
"1",
"1",
"2",
"1",
"1",
"1",
"2",
"1",
"3",
"1",
"2",
"2",
"1",
"1",
"3",
"1",
"3",
"2",
"2",
"1",
"4",
"1",
"2",
"1",
"3",
"1",
"6",
"1",
"1",
"2",
"2",
"2",
"6",
"1",
"2",
"2",
"4",
"1",
"6",
"1",
"3",
"3",
"2",
"1",
"5",
"1",
"3",
"2",
"3",
"1",
"4",
"2",
"4",
"2",
"2",
"1",
"12",
"1",
"2",
"3",
"1",
"2",
"6",
"1",
"3",
"2",
"6",
"1",
"10",
"1",
"2",
"3",
"3",
"2",
"6",
"1",
"5",
"1",
"2",
"1",
"12",
"2",
"2",
"2",
"4",
"1",
"12",
"2",
"3",
"2",
"2",
"2",
"6",
"1",
"3",
"3",
"6",
"1"
] | [
"nonn",
"easy"
] | 123 | 1 | 6 | [
"A000040",
"A000142",
"A000961",
"A002033",
"A002110",
"A008480",
"A036038",
"A036039",
"A036040",
"A050382",
"A080575",
"A099848",
"A099849",
"A102189",
"A112624",
"A124010",
"A130675",
"A260633",
"A260987",
"A355939"
] | null | Olivier Gérard | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008480.seq | 54c49148ab8e420b76369a5b8f3f405d |
A008481 | If n = Product (p_j^k_j) then a(n) = Sum partition(k_j). | [
"0",
"1",
"1",
"2",
"1",
"2",
"1",
"3",
"2",
"2",
"1",
"3",
"1",
"2",
"2",
"5",
"1",
"3",
"1",
"3",
"2",
"2",
"1",
"4",
"2",
"2",
"3",
"3",
"1",
"3",
"1",
"7",
"2",
"2",
"2",
"4",
"1",
"2",
"2",
"4",
"1",
"3",
"1",
"3",
"3",
"2",
"1",
"6",
"2",
"3",
"2",
"3",
"1",
"4",
"2",
"4",
"2",
"2",
"1",
"4",
"1",
"2",
"3",
"11",
"2",
"3",
"1",
"3",
"2",
"3",
"1",
"5",
"1",
"2",
"3",
"3",
"2",
"3",
"1",
"6",
"5",
"2",
"1",
"4",
"2",
"2",
"2"
] | [
"nonn",
"easy"
] | 32 | 1 | 4 | [
"A000041",
"A007814",
"A008481",
"A025487",
"A077761",
"A318312",
"A318473"
] | null | Olivier Gérard | 2023-09-29T04:05:08 | oeisdata/seq/A008/A008481.seq | e57c2808f1ba9508caf1b3e902229d1a |
A008482 | Coefficients in expansion of (x-1)*(1+x)^(n-1), n > 0. | [
"0",
"-1",
"1",
"-1",
"0",
"1",
"-1",
"-1",
"1",
"1",
"-1",
"-2",
"0",
"2",
"1",
"-1",
"-3",
"-2",
"2",
"3",
"1",
"-1",
"-4",
"-5",
"0",
"5",
"4",
"1",
"-1",
"-5",
"-9",
"-5",
"5",
"9",
"5",
"1",
"-1",
"-6",
"-14",
"-14",
"0",
"14",
"14",
"6",
"1",
"-1",
"-7",
"-20",
"-28",
"-14",
"14",
"28",
"20",
"7",
"1",
"-1",
"-8",
"-27",
"-48",
"-42",
"0",
"42",
"48",
"27",
"8",
"1",
"-1",
"-9",
"-35",
"-75",
"-90",
"-42",
"42"
] | [
"sign",
"easy",
"tabl"
] | 48 | 0 | 12 | [
"A000108",
"A007318",
"A008315",
"A008482",
"A037012"
] | null | N. J. A. Sloane | 2019-02-12T09:24:42 | oeisdata/seq/A008/A008482.seq | 0c60fe6c0ada10530ada6a06e1f740f3 |
A008483 | Number of partitions of n into parts >= 3. | [
"1",
"0",
"0",
"1",
"1",
"1",
"2",
"2",
"3",
"4",
"5",
"6",
"9",
"10",
"13",
"17",
"21",
"25",
"33",
"39",
"49",
"60",
"73",
"88",
"110",
"130",
"158",
"191",
"230",
"273",
"331",
"391",
"468",
"556",
"660",
"779",
"927",
"1087",
"1284",
"1510",
"1775",
"2075",
"2438",
"2842",
"3323",
"3872",
"4510"
] | [
"nonn",
"easy"
] | 156 | 0 | 7 | [
"A000012",
"A000041",
"A002865",
"A005176",
"A005638",
"A008284",
"A008483",
"A008484",
"A026794",
"A026796",
"A026797",
"A026798",
"A026799",
"A026800",
"A026801",
"A026802",
"A026803",
"A026807",
"A027336",
"A033301",
"A051031",
"A059841",
"A165626",
"A165627",
"A165628",
"A165652",
"A179184",
"A185325",
"A185326",
"A185327",
"A185328",
"A185329",
"A281356"
] | null | T. Forbes (anthony.d.forbes(AT)googlemail.com) | 2025-02-16T08:32:32 | oeisdata/seq/A008/A008483.seq | f46c3ab5a102253dc28af970df63e0f0 |
A008484 | Number of partitions of n into parts >= 4. | [
"1",
"0",
"0",
"0",
"1",
"1",
"1",
"1",
"2",
"2",
"3",
"3",
"5",
"5",
"7",
"8",
"11",
"12",
"16",
"18",
"24",
"27",
"34",
"39",
"50",
"57",
"70",
"81",
"100",
"115",
"140",
"161",
"195",
"225",
"269",
"311",
"371",
"427",
"505",
"583",
"688",
"791",
"928",
"1067",
"1248",
"1434",
"1668",
"1914",
"2223",
"2546",
"2945",
"3370",
"3889",
"4443",
"5113",
"5834",
"6698"
] | [
"nonn",
"easy"
] | 93 | 0 | 9 | [
"A000041",
"A002865",
"A008483",
"A008484",
"A026794",
"A026796",
"A026797",
"A026798",
"A026799",
"A026800",
"A026801",
"A026802",
"A026803",
"A026807",
"A185114",
"A185224",
"A185304",
"A185314",
"A185325",
"A185326",
"A185327",
"A185328",
"A185329",
"A185334",
"A185344",
"A185354",
"A185364"
] | null | T. Forbes (anthony.d.forbes(AT)googlemail.com) | 2024-12-01T10:03:46 | oeisdata/seq/A008/A008484.seq | 5c6562c97e731fa80cd50de728dbfeef |
A008485 | Coefficient of x^n in Product_{k>=1} 1/(1-x^k)^n. | [
"1",
"1",
"5",
"22",
"105",
"506",
"2492",
"12405",
"62337",
"315445",
"1605340",
"8207563",
"42124380",
"216903064",
"1119974875",
"5796944357",
"30068145905",
"156250892610",
"813310723925",
"4239676354650",
"22130265931900",
"115654632452535",
"605081974091875",
"3168828466966388",
"16610409114771900"
] | [
"nonn"
] | 59 | 0 | 3 | [
"A000041",
"A000712",
"A000716",
"A005758",
"A006922",
"A008485",
"A023003",
"A023021",
"A109085",
"A192435",
"A252782",
"A255526",
"A255672",
"A270913",
"A270915",
"A270919"
] | null | T. Forbes (anthony.d.forbes(AT)googlemail.com) | 2023-04-20T11:50:42 | oeisdata/seq/A008/A008485.seq | 18aec8e2c059c2c7795097bd31275b07 |
A008486 | Expansion of (1 + x + x^2)/(1 - x)^2. | [
"1",
"3",
"6",
"9",
"12",
"15",
"18",
"21",
"24",
"27",
"30",
"33",
"36",
"39",
"42",
"45",
"48",
"51",
"54",
"57",
"60",
"63",
"66",
"69",
"72",
"75",
"78",
"81",
"84",
"87",
"90",
"93",
"96",
"99",
"102",
"105",
"108",
"111",
"114",
"117",
"120",
"123",
"126",
"129",
"132",
"135",
"138",
"141",
"144",
"147",
"150",
"153",
"156",
"159",
"162",
"165",
"168",
"171",
"174",
"177",
"180",
"183",
"186"
] | [
"nonn",
"easy"
] | 169 | 0 | 2 | [
"A000217",
"A001651",
"A005448",
"A006784",
"A008458",
"A008486",
"A008574",
"A008576",
"A008579",
"A008585",
"A008706",
"A019557",
"A022144",
"A022424",
"A072154",
"A113062",
"A128834",
"A139250",
"A158799",
"A219529",
"A234275",
"A250120",
"A250122",
"A296368",
"A298014",
"A298015",
"A298016",
"A298022",
"A298024",
"A298026",
"A298028",
"A298029",
"A298031",
"A298033",
"A298035",
"A298036",
"A298038",
"A298040"
] | null | N. J. A. Sloane | 2023-10-26T08:46:28 | oeisdata/seq/A008/A008486.seq | b458efd4851ee0d6341dfbf115053132 |
A008487 | Expansion of (1-x^5) / (1-x)^5. | [
"1",
"5",
"15",
"35",
"70",
"125",
"205",
"315",
"460",
"645",
"875",
"1155",
"1490",
"1885",
"2345",
"2875",
"3480",
"4165",
"4935",
"5795",
"6750",
"7805",
"8965",
"10235",
"11620",
"13125",
"14755",
"16515",
"18410",
"20445",
"22625",
"24955",
"27440",
"30085",
"32895",
"35875",
"39030",
"42365",
"45885",
"49595",
"53500",
"57605",
"61915"
] | [
"nonn",
"easy"
] | 61 | 0 | 2 | [
"A000292",
"A008487",
"A008498",
"A008531",
"A222408"
] | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008487.seq | 5d585785d702bcb534824ec11ef6ef87 |
A008488 | Expansion of (1-x^6) / (1-x)^6. | [
"1",
"6",
"21",
"56",
"126",
"252",
"461",
"786",
"1266",
"1946",
"2877",
"4116",
"5726",
"7776",
"10341",
"13502",
"17346",
"21966",
"27461",
"33936",
"41502",
"50276",
"60381",
"71946",
"85106",
"100002",
"116781",
"135596",
"156606",
"179976",
"205877",
"234486",
"265986",
"300566",
"338421",
"379752",
"424766",
"473676",
"526701"
] | [
"nonn",
"easy"
] | 43 | 0 | 2 | null | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008488.seq | 8160c040161593d047b02ecf506a9c97 |
A008489 | Expansion of (1-x^7)/(1-x)^7. | [
"1",
"7",
"28",
"84",
"210",
"462",
"924",
"1715",
"2996",
"4977",
"7924",
"12166",
"18102",
"26208",
"37044",
"51261",
"69608",
"92939",
"122220",
"158536",
"203098",
"257250",
"322476",
"400407",
"492828",
"601685",
"729092",
"877338",
"1048894",
"1246420",
"1472772",
"1731009",
"2024400",
"2356431",
"2730812",
"3151484"
] | [
"nonn",
"easy"
] | 49 | 0 | 2 | null | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008489.seq | f687ee4f83bbcb624040e52a361c6263 |
A008490 | Expansion of (1-x^8) / (1-x)^8. | [
"1",
"8",
"36",
"120",
"330",
"792",
"1716",
"3432",
"6434",
"11432",
"19412",
"31704",
"50058",
"76728",
"114564",
"167112",
"238722",
"334664",
"461252",
"625976",
"837642",
"1106520",
"1444500",
"1865256",
"2384418",
"3019752",
"3791348",
"4721816",
"5836490",
"7163640",
"8734692",
"10584456",
"12751362",
"15277704"
] | [
"nonn",
"easy"
] | 27 | 0 | 2 | null | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008490.seq | 839c3e7fe4d6a4be72852bdc44e48c08 |
A008491 | Expansion of (1-x^9 ) / (1-x)^9. | [
"1",
"9",
"45",
"165",
"495",
"1287",
"3003",
"6435",
"12870",
"24309",
"43749",
"75537",
"125805",
"202995",
"318483",
"487311",
"729036",
"1068705",
"1537965",
"2176317",
"3032523",
"4166175",
"5649435",
"7568955",
"10027986",
"13148685",
"17074629",
"21973545",
"28040265",
"35499915",
"44611347",
"55670823",
"69015960"
] | [
"nonn",
"easy"
] | 26 | 0 | 2 | null | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008491.seq | 41f5eb4c6b431bd2686a4b75f288b479 |
A008492 | Expansion of (1-x^10) / (1-x)^10. | [
"1",
"10",
"55",
"220",
"715",
"2002",
"5005",
"11440",
"24310",
"48620",
"92377",
"167950",
"293875",
"497200",
"816475",
"1305502",
"2037970",
"3113110",
"4662515",
"6858280",
"9922627",
"14139190",
"19866145",
"27551380",
"37749910",
"51143752",
"68564485",
"91018730",
"119716795",
"156104740",
"201900127"
] | [
"nonn",
"easy"
] | 33 | 0 | 2 | null | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008492.seq | 4505630ade335ec281767c4923c3ed78 |
A008493 | Expansion of (1-x^11) / (1-x)^11. | [
"1",
"11",
"66",
"286",
"1001",
"3003",
"8008",
"19448",
"43758",
"92378",
"184756",
"352715",
"646635",
"1144000",
"1960970",
"3267759",
"5308732",
"8428277",
"13103662",
"19986252",
"29952637",
"44167409",
"64159524",
"91914394",
"129984074",
"181618140",
"250918096",
"343018401",
"464297471",
"622622286"
] | [
"nonn",
"easy"
] | 37 | 0 | 2 | [
"A001287",
"A008493"
] | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008493.seq | 8234ffc8e7901188428d33ed93c0a90c |
A008494 | Expansion of (1-x^12) / (1-x)^12. | [
"1",
"12",
"78",
"364",
"1365",
"4368",
"12376",
"31824",
"75582",
"167960",
"352716",
"705432",
"1352077",
"2496132",
"4457322",
"7725796",
"13036530",
"21469812",
"34584914",
"54595476",
"84596733",
"128856520",
"193184004",
"285392328",
"415873822",
"598309152",
"850534752",
"1195596128",
"1663018149"
] | [
"nonn",
"easy"
] | 17 | 0 | 2 | null | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008494.seq | 5d05447c15982ff1b0542fb2cb5492d6 |
A008495 | Expansion of (1-x^13) / (1-x)^13. | [
"1",
"13",
"91",
"455",
"1820",
"6188",
"18564",
"50388",
"125970",
"293930",
"646646",
"1352078",
"2704156",
"5200299",
"9657687",
"17383769",
"30421300",
"51894115",
"86487037",
"141101961",
"225742452",
"354691350",
"548060110",
"833805154",
"1250325622",
"1849778840",
"2702274848",
"3901139736",
"5569469620"
] | [
"nonn",
"easy"
] | 28 | 0 | 2 | null | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008495.seq | 2a5037e2a74fdd0c9512dfa28753d6d4 |
A008496 | a(n) = floor(n/5)*floor((n+1)/5)*floor((n+2)/5). | [
"0",
"0",
"0",
"0",
"0",
"1",
"1",
"1",
"2",
"4",
"8",
"8",
"8",
"12",
"18",
"27",
"27",
"27",
"36",
"48",
"64",
"64",
"64",
"80",
"100",
"125",
"125",
"125",
"150",
"180",
"216",
"216",
"216",
"252",
"294",
"343",
"343",
"343",
"392",
"448",
"512",
"512",
"512",
"576",
"648",
"729",
"729",
"729",
"810",
"900",
"1000"
] | [
"nonn"
] | 16 | 0 | 9 | [
"A008382",
"A008496",
"A008497"
] | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008496.seq | 0d961ed9581cc5a93304416b78a69491 |
A008497 | a(n) = floor(n/5)*floor((n+1)/5). | [
"0",
"0",
"0",
"0",
"0",
"1",
"1",
"1",
"1",
"2",
"4",
"4",
"4",
"4",
"6",
"9",
"9",
"9",
"9",
"12",
"16",
"16",
"16",
"16",
"20",
"25",
"25",
"25",
"25",
"30",
"36",
"36",
"36",
"36",
"42",
"49",
"49",
"49",
"49",
"56",
"64",
"64",
"64",
"64",
"72",
"81",
"81",
"81",
"81",
"90",
"100",
"100",
"100",
"100",
"110",
"121",
"121",
"121",
"121"
] | [
"nonn"
] | 21 | 0 | 10 | [
"A002266",
"A008497"
] | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008497.seq | 37989f321f1b198f4e3a0e87edb88398 |
A008498 | 4-dimensional centered tetrahedral numbers. | [
"1",
"6",
"21",
"56",
"126",
"251",
"456",
"771",
"1231",
"1876",
"2751",
"3906",
"5396",
"7281",
"9626",
"12501",
"15981",
"20146",
"25081",
"30876",
"37626",
"45431",
"54396",
"64631",
"76251",
"89376",
"104131",
"120646",
"139056",
"159501",
"182126"
] | [
"nonn",
"easy"
] | 48 | 0 | 2 | [
"A000332",
"A005894",
"A006522",
"A008498"
] | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008498.seq | 6d347e8a85b9b9e27a58194671554c17 |
A008499 | Number of 5-dimensional centered tetrahedral numbers. | [
"1",
"7",
"28",
"84",
"210",
"462",
"923",
"1709",
"2975",
"4921",
"7798",
"11914",
"17640",
"25416",
"35757",
"49259",
"66605",
"88571",
"116032",
"149968",
"191470",
"241746",
"302127",
"374073",
"459179",
"559181",
"675962",
"811558",
"968164",
"1148140"
] | [
"nonn",
"easy"
] | 31 | 0 | 2 | null | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008499.seq | 78caec58f4762c8ff9f45475d052b333 |
A008500 | 6-dimensional centered tetrahedral numbers. | [
"1",
"8",
"36",
"120",
"330",
"792",
"1716",
"3431",
"6427",
"11404",
"19328",
"31494",
"49596",
"75804",
"112848",
"164109",
"233717",
"326656",
"448876",
"607412",
"810510",
"1067760",
"1390236",
"1790643",
"2283471",
"2885156",
"3614248",
"4491586",
"5540480",
"6786900",
"8259672"
] | [
"nonn",
"easy"
] | 38 | 0 | 2 | [
"A008489",
"A008500"
] | null | N. J. A. Sloane | 2022-09-08T08:44:35 | oeisdata/seq/A008/A008500.seq | 7052f8d13527a6f68877545aa12a2003 |
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