id
stringlengths
7
11
seq
listlengths
1
347
keywords
listlengths
1
8
A224605
[ 1694, 1221, 1455, 1657, 2091, 2656, 3308, 4272, 5672, 7588, 10325, 14312, 20058, 28377, 40512, 58215, 84052, 121832, 177116, 258031, 376513, 550059, 804293, 1176775, 1722562, 2522335, 3694335, 5411860, 7928889, 11617642, 17023637 ]
[ "nonn" ]
A072339
[ 1, 1, 2, 1, 3, 2, 2, 1, 3, 3, 4, 2, 3, 2, 2, 1, 3, 3, 4, 3, 5, 4, 4, 2, 3, 3, 4, 2, 3, 2, 2, 1, 3, 3, 4, 3, 5, 4, 4, 3, 5, 5, 6, 4, 5, 4, 4, 2, 3, 3, 4, 3, 5, 4, 4, 2, 3, 3, 4, 2, 3, 2, 2, 1, 3, 3, 4, 3, 5, 4, 4, 3, 5, 5, 6, 4, 5, 4, 4, 3, 5, 5, 6, 5, 7, 6, 6, 4, 5, 5, 6, 4, 5, 4, 4, 2, 3, 3, 4, 3, 5, 4, 4, 3, 5 ]
[ "nonn", "easy", "nice" ]
A109589
[ 0, 1, -2, 0, -8, 40, -384, 4144, -54144, 815616, -13958400, 267218688, -5657444352, 131222866944, -3308765300736, 90105807790080, -2635416865112064, 82388152861360130, -2741414412289573000, 96732603325960220000, -3.60773103192291e+21 ]
[ "sign" ]
A311843
[ 1, 4, 8, 13, 17, 21, 26, 30, 34, 38, 42, 47, 51, 55, 60, 64, 68, 72, 76, 81, 85, 89, 94, 98, 102, 106, 110, 115, 119, 123, 128, 132, 136, 140, 144, 149, 153, 157, 162, 166, 170, 174, 178, 183, 187, 191, 196, 200, 204, 208 ]
[ "nonn" ]
A226773
[ 1, 2, 6, 28, 216, 3008, 82944, 4774912, 575299584, 142633336832, 71796623671296, 72847596766363650, 148448195686743150000, 6.063927804119245e+23, 4.960249711027692e+27, 8.120404229788517e+31, 2.659755256932431e+36 ]
[ "nonn" ]
A326273
[ 1, 3, 36, 837, 29592, 1439775, 90723564, 7109399241, 672900166584, 75245901590187, 9770338275393240, 1452674820992915700, 244491148094925000000, 4.613199528764583e+22, 9.678693008639052e+24, 2.2419685575401653e+27, 5.6984834660687244e+29, 1.5806941960663485e+32, 4.762165584984475e+34, 1.5515379326590124e+37, 5.445580659887212e+39 ]
[ "nonn" ]
A017205
[ 19683, 5159780352, 794280046581, 19683000000000, 208728361158759, 1352605460594688, 6351461955384057, 23762680013799936, 75084686279296880, 208215748530929660, 520411082988487300, 1195092568622311000, 2558036924386500600, 5159780352000000000, 9892530380752882000 ]
[ "nonn", "easy" ]
A095486
[ 1.111111111111111e+46, 101111, 1202, 233, 142, 115, 65, 57, 52, 47, 43 ]
[ "nonn" ]
A010443
[ 0, 1, 2, 4, 5, 8, 9, 10, 16, 18, 20, 21, 23, 25, 31, 32, 33, 36, 37, 39, 40, 41, 42, 43, 45, 46, 49, 50, 51, 57, 59, 61, 62, 64, 66, 72, 73, 74, 77, 78, 80, 81 ]
[ "nonn", "fini", "full", "easy" ]
A189989
[ 13860, 16380, 21420, 23100, 23940, 25740, 27300, 28980, 32340, 33660, 34650, 35700, 36036, 36540, 37620, 38220, 39060, 39780, 39900, 40950, 42900, 44460, 45540, 46620, 47124, 48300, 48510, 49980, 50820, 51660, 52668, 53550, 53820, 54180 ]
[ "nonn" ]
A076861
[ 1, 4, 9, 21, 52 ]
[ "nonn", "more" ]
A219140
[ 21, 225, 4033, 59127, 872437, 12867295, 191707377, 2851740545, 42351530487, 628917557052, 9343657589877, 138832484811480, 2062679454951201, 30644671161036036, 455284849342096260, 6764205083943142000 ]
[ "nonn" ]
A101830
[ 0, 41, 5021 ]
[ "nonn", "bref", "hard", "more" ]
A006707
[ 1, 7, 24, 50, 58, 3, -120, -200, -39, 402, 728, 246, -1200, -2338, -1032, 3188, 6654, 3357, -7880, -17300, -9354, 18680, 42224, 23748, -42590, -98109, -56568, 93214, 218068, 127821, -197056, -465888, -275949, 405044, 962936, 573660, -811156, -1934558, -1155768, 1584700, 3787096 ]
[ "sign", "easy" ]
A315395
[ 1, 6, 11, 15, 19, 23, 27, 31, 35, 39, 43, 48, 54, 60, 65, 69, 73, 77, 81, 85, 89, 93, 97, 102, 108, 114, 119, 123, 127, 131, 135, 139, 143, 147, 151, 156, 162, 168, 173, 177, 181, 185, 189, 193, 197, 201, 205, 210, 216, 222 ]
[ "nonn" ]
A130251
[ 0, 2, 4, 7, 10, 14, 18, 22, 26, 30, 34, 39, 44, 49, 54, 59, 64, 69, 74, 79, 84, 90, 96, 102, 108, 114, 120, 126, 132, 138, 144, 150, 156, 162, 168, 174, 180, 186, 192, 198, 204, 210, 216, 223, 230, 237, 244, 251, 258, 265, 272, 279, 286, 293, 300, 307, 314, 321 ]
[ "nonn" ]
A107548
[ 1, 450, 37690, 1252106, 22905330, 272968658, 2350138410, 15679197210, 85233151458, 391856046050, 1567440920346, 5576512118570, 17955135189970, 53053662957042, 145495299159050, 373781033269306, 906487838507970, 2088730171811330, 4597733181281018 ]
[ "nonn", "easy" ]
A004804
[ 4, 1027, 2050, 3073, 4096, 59052, 60075, 61098, 62121, 118100, 119123, 120146, 177148, 178171, 236196, 1048579, 1049602, 1050625, 1051648, 1107627, 1108650, 1109673, 1166675, 1167698, 1225723, 2097154, 2098177, 2099200, 2156202, 2157225 ]
[ "nonn", "easy" ]
A066650
[ 1, 3, 4, 6, 7, 8, 11, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 25, 27, 29, 30, 32, 34, 35, 38, 39, 40, 41, 42, 45, 46, 47, 48, 49, 51, 53, 54, 55, 56, 58, 59, 60, 61, 62, 64, 66, 67, 69, 70, 71, 74, 75, 77, 78, 79, 81, 83, 84, 85, 86, 87, 88, 90, 92, 93, 94, 95, 96, 97, 98, 99 ]
[ "nonn" ]
A107391
[ 24, -896, 67584, -4161536, 268959744, -17171480576, 1099645845504, -70366596694016, 4503633987108864, -288229826395897860, 18446752869802574000, -1.180591479979923e+21, 7.555786597771414e+22 ]
[ "sign", "easy" ]
A290353
[ 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 2, 1, 0, 1, 1, 3, 3, 1, 0, 1, 1, 4, 6, 5, 1, 0, 1, 1, 5, 10, 14, 7, 1, 0, 1, 1, 6, 15, 30, 27, 11, 1, 0, 1, 1, 7, 21, 55, 75, 58, 15, 1, 0, 1, 1, 8, 28, 91, 170, 206, 111, 22, 1, 0, 1, 1, 9, 36, 140, 336, 571, 518, 223, 30, 1, 0 ]
[ "nonn", "tabl" ]
A362158
[ -1, -1, 3, 23, 119, 1119, 19259, 417143, 10567983, 309715199, 10335277619, 386840046999, 16045111426343, 730346987476703, 36191354975508456, 1939288175212059000, 111724538084900570000, 6.886112439566788e+21, 4.5211254535065044e+23 ]
[ "sign", "easy" ]
A050855
[ 2, 9, 12, 17, 20, 21, 50, 53, 132, 168, 341, 360, 381, 501, 1065, 1169, 1545, 2109, 2520, 2661, 3149, 4077, 11252, 21588, 21692, 39509, 52685, 67196, 87708, 232436, 372312, 417818, 481385, 507833 ]
[ "hard", "nonn" ]
A051238
[ 3, 1, 18, 11, 12, 21, 2, 4, 13, 196, 201, 371, 28, 224, 202, 95, 89, 3, 109, 112, 88, 253, 17, 34, 93, 31, 1, 5, 132, 72, 190, 111, 143, 144, 18, 20, 271, 86, 107, 67, 125, 98, 135, 240, 11, 104, 26, 229, 35, 236, 94, 16, 19, 77, 302, 154, 39, 326, 12, 21 ]
[ "base", "easy", "nice", "nonn" ]
A362257
[ 1, 0, 1, 2, 1, 2, 3, 2, 3, 2, 1, 4, 3, 2, 5, 2, 3, 4, 3, 4, 3, 2, 1, 8, 3, 2, 5, 4, 3, 2, 9, 2, 1, 6, 7, 2, 3, 6, 3, 4, 5, 4, 5, 4, 3, 2, 1, 16, -1, 0, 9, 4, -1, 6, 5, 0, 7, 2, 5, 4, 3, 2, 17, 2, -3, 10, 3, -2, 9, 10, 3, 4, 7, 4, 5, 2, 7, 2, 3, 6, 7, 4, 3, 8 ]
[ "sign" ]
A337009
[ 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 5, 5, 3, 1, 1, 8, 11, 6, 3, 1, 1, 13, 19, 13, 6, 3, 1, 1, 21, 37, 25, 14, 6, 3, 1, 1, 34, 65, 52, 27, 14, 6, 3, 1, 1, 55, 120, 98, 58, 28, 14, 6, 3, 1, 1, 89, 210, 191, 113, 60, 28, 14, 6, 3, 1, 1, 144, 376, 360, 229, 119, 61, 28, 14, 6, 3, 1, 1, 233, 654, 678, 443, 244, 121, 61, 28, 14, 6, 3, 1, 1 ]
[ "nonn", "tabl" ]
A267380
[ 3, 2, 3, 4, 3, 2, 3, 3, 3, 2, 2, 3, 2, 3, 3, 2, 4, 3, 2, 3, 2, 3, 2, 3, 3, 3, 2, 3, 4, 3, 2, 3, 5, 3, 2, 3, 4, 2, 3, 2, 3, 4, 3, 3, 2, 3, 4, 4, 3, 2, 3, 4, 3, 2, 3, 2, 3, 4, 3, 3, 3, 2, 3, 4, 3, 2, 2, 3, 2, 3, 4, 3, 2, 3, 3, 2, 3, 4, 3, 2, 4, 3, 2, 3, 4, 3, 2, 3, 2, 3, 2, 3, 4, 3, 2, 3, 3, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 4, 3, 2, 3, 3, 2, 3, 2, 3, 4, 3, 2, 3, 3, 3, 3, 2, 3, 4, 3, 2 ]
[ "nonn" ]
A206779
[ 2, 16, 230, 6752, 316744, 25571618, 3210775788, 659966594476, 210237711494832, 108398626938474980, 87023259420675850000, 1.1320357857140795e+23, 2.3063291442594383e+26 ]
[ "nonn" ]
A208101
[ 1, 1, 1, 1, 2, 1, 1, 3, 2, 2, 1, 4, 3, 5, 2, 1, 5, 4, 9, 5, 5, 1, 6, 5, 14, 9, 14, 5, 1, 7, 6, 20, 14, 28, 14, 14, 1, 8, 7, 27, 20, 48, 28, 42, 14, 1, 9, 8, 35, 27, 75, 48, 90, 42, 42, 1, 10, 9, 44, 35, 110, 75, 165, 90, 132, 42, 1, 11, 10, 54, 44, 154, 110 ]
[ "nonn", "tabl" ]
A321533
[ 34, 158, 226, 266, 459, 3045, 3518, 3914, 4305, 6236, 8307, 10538, 10574, 18183, 23228, 25346, 25916, 33866, 33998, 48614, 49119, 51015, 56506, 63986, 72267, 82916, 94695, 100634, 144507, 154203, 186879, 269307, 281979, 308926, 358298, 358587, 367802, 380727, 382755, 412796, 474183 ]
[ "nonn" ]
A107379
[ 1, 1, 1, 3, 9, 30, 110, 436, 1801, 7657, 33401, 148847, 674585, 3100410, 14422567, 67792847, 321546251, 1537241148, 7400926549, 35854579015, 174677578889, 855312650751, 4207291811538, 20782253017825, 103048079556241, 512753419159803, 2559639388956793 ]
[ "nonn", "easy" ]
A146412
[ 1, 1, 1, 1, 5, 25, 59, 371, 1829, 12351, 114789, 1410427, 19272237, 385707683, 8418983493, 256858401273 ]
[ "nonn" ]
A224264
[ 15, 225, 2017, 12467, 59855, 240829, 850875, 2717731, 8000608, 22004896, 57114321, 140968221, 332855049, 755508149, 1654943378, 3509994992, 7227765020, 14484196632, 28304567857, 54032736159, 100918573991, 184671328897, 331497593861, 584386115169, 1012744010692 ]
[ "nonn" ]
A326888
[ 0, 0, 1, 6, 48, 369, 3341, 33960, 393467, 5111052, 73753685, 1170468816, 20263758984, 380047813297, 7676106093000, 166114206886740, 3834434320842720, 94042629507381950, 2442147034668045000, 66942194905675830000, 1.9315434523445237e+21, 5.851919135915595e+22 ]
[ "nonn" ]
A148752
[ 1, 1, 3, 7, 28, 77, 323, 1027, 4499, 15234, 68652, 244482, 1119699, 4128033, 19132050, 72551151, 339255496, 1313734573, 6186905395, 24392958836, 115515119719, 461965418939, 2197874309312, 8900519548172, 42506496184050, 173921532421315, 833329355690755, 3441435610292513, 16534808770189512 ]
[ "nonn", "walk" ]
A245554
[ 1, 2, 1, 3, 3, 1, 2, 1, 3, 1, 1, 1, 2, 1, 3, 3, 1, 2, 1, 3, 1, 1, 2, 1, 3, 1, 2, 1, 3, 1, 2, 1, 3, 3, 1, 2, 1, 3, 1, 1, 1, 2, 1, 3, 3, 1, 2, 1, 3, 1, 1, 2, 1, 3, 1, 2, 1, 3, 3, 1, 2, 1, 3, 1, 1, 2, 1, 3, 3, 1, 2, 1, 3, 1, 1, 2, 1, 3, 3, 1, 2, 1, 3, 1, 1, 1, 2, 1, 3, 3, 1, 2 ]
[ "nonn" ]
A048210
[ 2, 5, 11, 17, 28, 40, 58, 74, 91, 117, 140, 168, 195, 225, 263, 298, 334, 371, 411, 453, 497, 547, 597, 647, 698, 754, 815, 878, 942, 1008, 1074, 1149, 1233, 1316, 1398, 1483, 1570, 1657, 1751, 1843, 1936, 2044, 2152, 2262, 2371 ]
[ "nonn" ]
A108989
[ 9, 25, 27, 81, 121, 125, 169, 243, 361, 625, 729, 841, 1331, 1369, 2187, 2197, 2809, 3125, 3481, 3721, 4489, 6561, 6859, 6889, 10201, 11449, 14641, 15625, 17161, 19321, 19683, 22201, 24389, 26569, 28561, 29929, 32041, 32761, 38809, 44521, 50653 ]
[ "nonn" ]
A268835
[ 0, 1, 2, 1, 2, 3, 2, 3, 2, 3, 4, 5, 2, 1, 4, 3, 2, 3, 4, 5, 4, 3, 6, 5, 2, 3, 2, 1, 4, 5, 4, 3, 2, 3, 4, 5, 4, 3, 6, 5, 4, 5, 4, 3, 6, 7, 6, 5, 2, 3, 4, 3, 2, 3, 2, 3, 4, 5, 6, 5, 4, 3, 4, 3, 2, 3, 4, 5, 4, 3, 6, 5, 4, 5, 4, 3, 6, 7, 6, 5, 4, 5, 6, 5, 4, 5, 4, 5, 6, 7, 8, 7, 6, 5, 6, 5, 2, 3, 4, 3, 4, 5, 4, 5, 2, 3, 4, 5, 2, 1, 4, 3, 4, 5, 6, 5, 6, 5, 6, 5, 4 ]
[ "nonn" ]
A340072
[ 1, 1, 1, 3, 1, 4, 1, 9, 5, 3, 1, 6, 1, 5, 12, 27, 1, 20, 1, 18, 20, 12, 1, 36, 7, 16, 25, 30, 1, 6, 1, 81, 3, 9, 15, 15, 1, 11, 16, 27, 1, 20, 1, 18, 20, 28, 1, 54, 11, 42, 36, 12, 1, 100, 4, 45, 44, 15, 1, 72, 1, 36, 100, 243, 48, 48, 1, 54, 7, 12, 1, 180, 1, 40, 42, 66, 60, 64, 1, 162, 125, 21, 1, 120, 9, 23, 60, 108 ]
[ "nonn" ]
A112838
[ 1, 2, 5, 13, 13, 29, 34, 100, 130, 305, 361, 881, 1145, 2906, 3557, 8669, 10693, 26893, 33680, 83360, 102800, 254565, 317165, 790037, 980237, 2428298, 3011265, 7483801, 9301217, 23092857, 28646722, 71093860 ]
[ "easy", "nonn" ]
A190738
[ 1, 4, 27, 212, 1785, 15630, 140287, 1280592, 11833389, 110360150, 1036670272, 9794291556, 92972640761, 886023463122, 8471878678545, 81236546627920, 780898417097733, 7522708492892214, 72607180401922900, 701969331508142000, 6796919869909393000 ]
[ "nonn" ]
A202704
[ 0, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 2, 3, 3, 4, 5, 5, 23, 23, 22, 20, 17, 17, 14, 10, 5, 0, 0, 23, 46, 68, 88, 105, 105, 122, 136, 146, 151, 151, 1141, 1141, 1118, 1072, 1004, 916, 811, 811, 706, 584, 448, 302, 151, 0 ]
[ "nonn", "tabf" ]
A140639
[ 1, 1, 1, 1, 2, 5, 15, 51, 179, 647, 2397, 9081, 35181, 139307, 563218 ]
[ "nonn" ]
A158718
[ 0, 941, 9601, 0, 968041 ]
[ "fini", "full", "nonn", "base" ]
A001770
[ 2, 4, 8, 10, 12, 14, 18, 32, 48, 54, 72, 148, 184, 248, 270, 274, 420, 1340, 1438, 1522, 1638, 1754, 1884, 2014, 2170, 2548, 2622, 2652, 2704, 13510, 21738, 25624, 41934, 51478, 52540, 53230, 172300, 245728, 350028, 1194164 ]
[ "nonn", "nice", "hard", "more" ]
A279187
[ 1, 1, 1, 2, 1, 1, 2, 1, 1, 2, 1, 2, 4, 1, 4, 2, 6, 2, 1, 1, 4, 1, 2, 2, 6, 2, 1, 2, 4, 2, 10, 1, 6, 4, 1, 2, 6, 4, 2, 6, 3, 1, 4, 2, 1, 2, 4, 1, 10, 2, 2, 6, 4, 6, 4, 2, 1, 18, 4, 2, 1, 6, 3, 4, 2, 2, 10, 4, 11, 6, 1, 6, 4, 4, 1, 2, 2, 12, 6, 4, 6, 2, 6, 10, 3, 2 ]
[ "nonn" ]
A306950
[ 1, 2, 32, 36, 39, 50, 62, 147, 169, 190, 203, 467, 1035, 1075, 2174, 2475, 27047, 28097, 91087, 181175, 215795, 539654, 580160, 668988, 868879, 2611450, 14359486, 118119399, 1030191204, 1109928219, 2362155122 ]
[ "nonn", "more" ]
A187030
[ 0, 0, 5120, 45152, 161256, 376248, 696992, 1121176, 1647008, 2273384, 3000304, 3827768, 4755776, 5784328, 6913424, 8143064, 9473248, 10903976, 12435248 ]
[ "nonn" ]
A004746
[ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17, 19, 22, 23, 24, 25, 27, 28, 29, 30, 31, 32, 33, 35, 38, 39, 44, 45, 46, 47, 48, 49, 51, 54, 55, 56, 57, 59, 60, 61, 62, 63, 64, 65, 67, 70, 71, 76, 77, 78, 79, 88, 89, 91, 92, 93, 94, 95, 96, 97, 99, 102 ]
[ "nonn", "base", "easy" ]
A047125
[ 1, 2, 6, 28, 120, 501, 2020, 8062, 31992, 126556, 499478, 1968504, 7751812, 30513489, 120090702, 472636988, 1860354732, 7323975621, 28840527086, 113600162826, 447592682400, 1764087889221, 6954932056860, 27428450072466 ]
[ "nonn" ]
A243079
[ 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19, 35, 55, 62, 64, 66, 68, 75, 95, 236, 315, 324, 575, 612, 828, 935, 944, 4384, 5175, 7688, 7735, 8128, 8672, 9135, 9144, 9575, 91575 ]
[ "nonn", "base", "fini", "full" ]
A286815
[ 1, 1, 0, 1, 2, 0, 1, 4, 0, 0, 1, 6, 4, 0, 0, 1, 8, 12, 0, 2, 0, 1, 10, 24, 8, 4, 0, 0, 1, 12, 40, 32, 6, 8, 0, 0, 1, 14, 60, 80, 24, 24, 0, 0, 0, 1, 16, 84, 160, 90, 48, 24, 0, 0, 0, 1, 18, 112, 280, 252, 112, 96, 0, 4, 2, 0, 1, 20, 144, 448, 574, 312, 240, 64, 12 ]
[ "nonn", "tabl" ]
A078072
[ 2, 1, 4, 1, 3, 5, 2, 2, 2, 4, 3, 2, 1, 3, 2, 1, 1, 1, 8, 2, 2, 28, 1, 1, 4, 10, 1, 9, 62, 4, 1, 1, 1, 2, 3, 1, 3, 3, 9, 2, 1, 7, 1, 1, 1, 4, 1, 1, 2, 1, 8, 1, 5, 7, 2, 64, 1, 5, 2, 2, 2, 4, 1, 14, 1, 3, 2, 2, 2, 23, 1, 9, 1, 20, 2, 2, 12, 1, 1, 3, 1, 2, 1, 3, 7, 4, 3, 12, 1, 4, 2, 3, 1, 4, 1 ]
[ "nonn", "cofr" ]
A210099
[ 7, 225, 20687, 5115121, 3382058727, 5991606341393, 28434309064956830, 361537376127800200000, 1.2315682423794585e+25, 1.1239777642931333e+30 ]
[ "nonn" ]
A143638
[ 1, 1, 3, 34, 605, 16416, 644647, 33690574, 2252245353, 187575203080, 19000833293771, 2295318297423834, 325536649109809100, 53508774130762120000, 1.0080999100649218e+22, 2.156137639664134e+24, 5.192008386011686e+26, 1.3974012905516202e+29 ]
[ "nonn" ]
A009182
[ 1, 2, 20, 608, 34320, 3084640, 405224896, 73292662784, 17468683774208, 5306511481924096, 2001393333656872000, 917626310129679900000, 5.026546757829002e+23, 3.24215069803278e+26 ]
[ "nonn" ]
A276286
[ 1, 28, 364, 2912, 16044, 64792, 200928, 503360, 1089452, 2186940, 4196920, 7544992, 12547808, 19975256, 31553344, 48484800, 70439852, 99602104, 142487436, 200569824, 268594872, 354052608, 476105504, 630908096, 800698080, 1008274932, 1296257144 ]
[ "nonn" ]
A304565
[ 0, 0, 0, 0, 108, 6, 12, 18, 2, 32, 4362, 1500 ]
[ "nonn", "more" ]
A157022
[ 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, -1, -1, -1, 0, 0, 0, 0, -1, -1, -1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, -1, -1, -1, 0, 0, 0, 0, -1, -1, -1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, -1, -1, -1, 0, 0, 0, 0, -1, -1, -1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, -1, -1, -1, 0, 0, 0, 0, -1, -1, -1 ]
[ "easy", "sign" ]
A011280
[ 1, 2, 3, 2, 8, 4, 6, 7, 3, 9, 4, 4, 2, 0, 6, 6, 1, 3, 9, 0, 5, 3, 4, 0, 0, 7, 8, 9, 7, 3, 0, 9, 4, 8, 0, 2, 2, 7, 6, 9, 9, 7, 5, 3, 4, 8, 3, 2, 0, 1, 5, 8, 9, 3, 0, 5, 3, 0, 9, 2, 0, 2, 1, 9, 7, 1, 3, 2, 3, 9, 8, 9, 7, 2, 4, 7, 4, 4, 2, 3, 7, 1, 7, 7, 6, 2, 8, 0, 1, 6, 4, 9, 9, 8, 2, 5, 6, 9, 2 ]
[ "nonn", "cons" ]
A327992
[ 1, 11, 111, 101, 1111, 1101, 1011, 11111, 1001, 11101, 11011, 10111, 111111, 11001, 10101, 10011, 111101, 111011, 110111, 101111, 1111111, 10001, 111001, 110101, 101101, 110011, 101011, 100111, 1111101, 1111011, 1110111, 1101111, 1011111, 11111111 ]
[ "nonn", "tabf" ]
A314108
[ 1, 5, 11, 16, 21, 26, 30, 34, 39, 44, 49, 55, 60, 65, 71, 76, 81, 86, 90, 94, 99, 104, 109, 115, 120, 125, 131, 136, 141, 146, 150, 154, 159, 164, 169, 175, 180, 185, 191, 196, 201, 206, 210, 214, 219, 224, 229, 235, 240, 245 ]
[ "nonn" ]
A299941
[ 64, 3281, 5631, 22819, 106323, 495413, 2237911, 10459697, 49578223, 231751585, 1085770920, 5127919044, 24217578595, 114333621160, 541012865109, 2564516220733, 12167297494073, 57801712976511, 275029208611801 ]
[ "nonn" ]
A013366
[ 1, 0, 0, 10, -1288, 152934, -21952084, 4051623706, -956802094896, 283850233488142, -103778358157367220, 45952155963779120000, -2.4267844868956823e+22, 1.50827286493113e+25 ]
[ "sign" ]
A251258
[ 8, 18, 18, 38, 56, 38, 84, 150, 150, 84, 180, 446, 464, 446, 180, 394, 1232, 1770, 1770, 1232, 394, 850, 3602, 5680, 9130, 5680, 3602, 850, 1852, 10108, 21088, 38332, 38332, 21088, 10108, 1852, 4008, 29272, 69270, 192442, 185620, 192442, 69270, 29272, 4008 ]
[ "nonn", "tabl" ]
A274318
[ 1, 4, 6, 5, 2, 10, 8, 3, 7, 9, 16, 26, 29, 22, 20, 23, 28, 38, 12, 32, 46, 13, 14, 11, 15, 56, 35, 58, 47, 48, 24, 18, 21, 69, 17, 52, 41, 19, 82, 83, 70, 25, 30, 62, 93, 27, 65, 106, 78, 102, 37, 110, 112, 76, 116, 119, 92, 31, 34, 49, 39, 101, 33, 36, 138 ]
[ "nonn" ]
A144526
[ 1, 2, 4, 16, 128, 640, 5120, 71680, 573440, 2293760, 6553600, 504627200, 1153433600, 209924915200, 2938948812800, 58778976256000, 1880927240192000, 415269650432000, 255806104666112000, 15260018802688000, 194412639546245120000, 418734915945758700000 ]
[ "nonn", "frac" ]
A030004
[ 0, 0, 1, 10, 20, 56, 84, 165, 364, 455, 816, 1140, 1330, 1771, 2600, 3654, 4060, 5456, 6545, 7140, 9139, 10660, 13244, 17296, 19600, 20825, 23426, 24804, 27720, 39711, 43680, 50116, 52394, 64824, 67525, 76076, 85320, 91881, 102340, 113564, 117480, 138415 ]
[ "nonn" ]
A108726
[ 0, 4, 10, 18, 22, 24, 28, 30, 42, 48, 52, 64, 72, 78, 84, 88, 90, 94, 100, 102, 108, 114, 118, 130, 132, 144, 148, 154, 160, 162, 168, 178, 184, 192, 198, 202, 204, 210, 214, 238, 244, 252, 270, 280, 298, 300, 304, 312, 318, 322, 324, 328, 330, 340, 354, 358 ]
[ "nonn", "easy" ]
A202385
[ 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 2, 0, 2, 0, 0, 0, 2, 0, 2, 0, 1, 0, 4, 0, 3, 0, 1, 0, 5, 0, 8, 0, 2, 0, 5, 0, 10, 0, 4, 0, 13, 0, 15, 0, 3, 1, 13, 0, 19, 0, 9, 1, 24, 0, 20, 2, 13, 2, 29, 0, 34, 2, 17, 2, 34, 1, 49, 2, 21, 3, 58, 2, 63, 3, 20, 7, 72, 2, 81, 3 ]
[ "nonn" ]
A031903
[ 957, 1797, 2943, 3003, 3027, 3153, 3747, 4227, 4695, 4761, 5211, 5547, 5637, 6621, 7629, 7737, 8253, 8535, 9915, 9957, 10173, 10311, 10341, 11157, 12357, 12519, 12699, 13677, 13893, 14775, 14817, 14997, 15291, 15333, 15417, 15567 ]
[ "nonn" ]
A265094
[ 1, 1, 1, 8, 16, 243, 4096, 78125, 1679616, 134217728, 10000000000, 743008370688, 129746337890625, 20822964865671170, 6221821273427821000, 2.9543127065508336e+21, 1.2089258196146292e+24, 7.183252662235696e+26, 8.5043469612358e+29 ]
[ "nonn" ]
A252194
[ 441, 585, 970, 1642, 2931, 5316, 10074, 19529, 38353, 76314, 153452, 311237, 636604, 1310403, 2712616, 5647056, 11816544, 24840843, 52448289, 111189719, 236610322, 505256872, 1082373985, 2325479451, 5009653060, 10818218460, 23412891526 ]
[ "nonn" ]
A338341
[ 3, 13, 19, 23, 29, 43, 47, 59, 61, 73, 83, 97, 103, 107, 113, 127, 137, 139, 149, 157, 163, 179, 191, 193, 223, 227, 229, 233, 251, 269, 271, 283, 307, 313, 317, 331, 349, 353, 367, 373, 389, 397, 401, 409, 419, 433, 439, 449, 457, 461, 463, 467, 491, 499, 503, 509, 541, 547, 557 ]
[ "nonn" ]
A378871
[ 0, 2, 39, 30741 ]
[ "hard", "nonn", "more" ]
A057674
[ -3, 2, 5, 13, 29, 61, 109, 251, 509, 1021, 2029, 4093, 8179, 16381, 32749, 65519, 131059, 262139, 524269, 1048573, 2097133, 4194301, 8388571, 16777213, 33554371, 67108859, 134217649, 268435367, 536870909, 1073741783, 2147483629, 4294967291, 8589934513, 17179869143 ]
[ "sign" ]
A354254
[ 0, 1, 1, 1, 4, 1, 6, 1, 6, 6, 1, 6, 1, 13, 1, 15, 13, 1, 18, 1, 18, 21, 1, 23, 21, 1, 21, 23, 1, 21, 30, 1, 32, 21, 30, 21, 1, 37, 1, 39, 37, 1, 37, 39, 1, 37, 46, 1, 48, 37, 46, 51, 1, 46, 54, 1, 56, 46, 54, 56, 1, 46, 54, 63, 1, 1, 46, 1, 46, 63, 1, 71, 63 ]
[ "nonn", "base" ]
A018255
[ 1, 2, 3, 5, 6, 10, 15, 30 ]
[ "nonn", "fini", "full", "easy" ]
A101409
[ 1, 1, 2, 3, 5, 4, 12, 19, 16, 8, 55, 85, 73, 44, 16, 273, 416, 361, 234, 112, 32, 1428, 2156, 1883, 1269, 680, 272, 64, 7752, 11628, 10200, 7043, 4016, 1856, 640, 128, 43263, 64581, 56829, 39897, 23665, 11864, 4848, 1472, 256, 246675, 366850, 323587, 229936, 140161, 74050, 33360, 12256, 3328, 512 ]
[ "nonn", "tabl" ]
A221900
[ 6, 266, 7667, 236532, 7235107, 221465158, 6778558415, 207481075456, 6350624324828, 194381582401875, 5949680932424079, 182109354161412320, 5574049625663874000, 170611934699230950000, 5.222133675326885e+21 ]
[ "nonn" ]
A251134
[ 2129, 4786, 8050, 14753, 25597, 46023, 82431, 151567, 282371, 536601, 1033153, 2013629, 3956545, 7822675, 15528811, 30912211, 61642567, 123062869, 245854205, 491382289, 982373589, 1964284511, 3928022839, 7855407543, 15710071467 ]
[ "nonn" ]
A245108
[ 1, 2, 5, 17, 89, 556, 3982, 31177, 261069, 2309922, 21435122, 207605687, 2091924418, 21883241424, 237301377573, 2664817940085, 30965904565393, 372114924929070, 4621600351308022, 59287502088944350, 785045224973677600, 10721533799643490000, 150898539708638130000, 2.1866803258801612e+21 ]
[ "nonn" ]
A048551
[ 5, 53, 5303, 530303, 53030317, 530303173, 53030317313, 530303173133, 53030317313327, 53030317313327050, 5303031731332704000, 530303173133270450000, 5.303031731332705e+21, 5.303031731332705e+23 ]
[ "nonn", "base" ]
A087696
[ 8, 12, 18, 24, 36, 42, 48, 66, 78, 84, 102, 108, 132, 144, 162, 168, 186, 228, 234, 246, 276, 288, 312, 342, 354, 378, 384, 414, 426, 438, 444, 462, 504, 552, 582, 612, 636, 648, 678, 696, 714, 738, 756, 792, 816, 834, 858, 882, 924, 942, 972 ]
[ "easy", "nonn" ]
A381763
[ 0, 0, 1, 2, 1, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 2, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0 ]
[ "nonn" ]
A103492
[ 0, 0, 1, 1, 0, 5, 6, 0, 8, 9, 0, 11, 5, 0, 7, 3, 0, 2, 2, 0, 20, 3, 0, 23, 7, 0, 13, 10, 0, 29, 30, 0, 12, 33, 0, 35, 18, 0, 5, 39, 0, 41, 16, 0, 44, 12, 0, 9, 6, 0, 5, 51, 0, 53, 54, 0, 56, 11, 0, 16, 55, 0, 25, 63, 0, 65, 18, 0, 68, 23, 0, 60, 14, 0, 37, 75, 0, 6, 78, 0, 22, 27, 0, 83, 78, 0, 43 ]
[ "easy", "nonn" ]
A379390
[ 2, 2, 7, 8, 2, 9, 1, 6, 4, 1, 4, 4, 0, 4, 3, 7, 5, 4, 3, 6, 6, 1, 4, 9, 2, 5, 7, 0, 7, 1, 7, 4, 7, 6, 3, 0, 9, 1, 5, 0, 5, 9, 7, 4, 3, 2, 7, 4, 9, 6, 9, 9, 5, 5, 1, 8, 6, 0, 0, 2, 6, 7, 0, 9, 9, 9, 2, 3, 2, 7, 1, 9, 5, 2, 7, 3, 8, 0, 8, 5, 0, 2, 5, 8, 9, 1, 0, 9, 9, 9, 3, 7, 2, 9, 4, 4, 9, 6, 1, 5 ]
[ "nonn", "cons" ]
A194057
[ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 11, 12, 13, 14, 20, 21, 28, 36, 16, 17, 18, 19, 26, 27, 35, 44, 45, 55, 66, 22, 23, 24, 25, 33, 34, 43, 53, 54, 65, 29, 30, 31, 32, 41, 42, 52, 63, 64 ]
[ "nonn" ]
A241874
[ 26, 1048, 21362, 307660, 3574869, 35900857, 324623778, 2713846040, 21359949568, 160346402882, 1159100542422, 8127076433744, 55581620321035, 372410647606299, 2453173612562310, 15932182184914620, 102249194946464430, 649680545407604000, 4093272335570479600 ]
[ "nonn" ]
A185950
[ -1, 2, 13, 32, 59, 94, 137, 188, 247, 314, 389, 472, 563, 662, 769, 884, 1007, 1138, 1277, 1424, 1579, 1742, 1913, 2092, 2279, 2474, 2677, 2888, 3107, 3334, 3569, 3812, 4063, 4322, 4589, 4864, 5147, 5438, 5737, 6044, 6359, 6682, 7013, 7352, 7699, 8054, 8417, 8788, 9167, 9554, 9949, 10352, 10763, 11182, 11609 ]
[ "sign", "easy" ]
A385403
[ 10, 10, 7, 8, 8, 8 ]
[ "nonn", "more" ]
A242016
[ 3, 3, 3, 7, 3, 23, 3, 3, 7, 3, 3, 3, 7, 3, 47, 3, 31, 3, 7, 3, 233, 3, 3, 7, 3, 31, 3, 223, 3, 7, 3, 13367, 3, 431, 3, 7, 3, 2351, 3, 127, 3, 7, 3, 6361, 3, 23, 3, 7, 3, 179951, 3, 3, 7, 3, 31, 3, 193707721, 3, 7, 3 ]
[ "nonn" ]
A350027
[ 1583, 1585, 1588, 1591, 1594, 1597, 1600, 1601, 1604, 1605, 1607, 1608, 1611, 1612, 1615, 1618, 1621, 1624, 1627, 1628, 1629, 1631, 1632, 1634, 1635, 1638, 1639, 1642, 1645, 1648, 1649, 1651, 1654, 1656, 1658, 1659, 1662, 1665, 1666, 1668, 1669, 1672, 1675 ]
[ "nonn" ]
A200404
[ 1, 2, 6, 23, 107, 582, 3622, 25369, 197523, 1692535, 15829557, 160463512, 1752529064, 20516018396, 256273980368, 3402364791737, 47841014687039, 710242228143271, 11101522062378068, 182234745428876500, 3134424458578405400, 56371116965252450000 ]
[ "nonn" ]
A342854
[ 0, 0, 0, 0, 1, 2, 5, 9, 17, 26, 41, 60, 88, 120, 163, 213 ]
[ "nonn", "more" ]
A180322
[ 1, 1, 3, 6, 15, 21, 49, 72, 126, 195, 341, 486, 819, 1225, 1845, 2880, 4335, 6552, 9709, 14850, 21315, 33077, 47081, 72360, 102300, 158067, 220752, 341334, 475107, 732735, 1015777, 1566720, 2161599, 3333615, 4587135, 7062552, 9699291, 14922733, 20444697 ]
[ "nonn" ]
A276997
[ 1, 1, 1, 6, 1, 1, 1, 2, 2, 1, 60, 1, 1, 1, 1, 1, 6, 2, 3, 1, 1, 504, 4, 4, 1, 1, 1, 1, 1, 24, 8, 12, 2, 2, 2, 1, 2160, 18, 9, 3, 2, 1, 3, 1, 1, 1, 60, 4, 6, 1, 5, 1, 1, 1, 1, 3168, 48, 16, 6, 3, 2, 2, 1, 2, 1, 1, 1, 288, 32, 144, 12, 12, 4, 2, 1, 6, 2, 1 ]
[ "nonn", "frac", "tabl" ]
A023834
[ 0, 2, 3, 5, 6, 6, 7, 11, 9, 11, 12, 12, 13, 15, 14, 15, 15, 16, 15, 18, 17, 20, 22, 22, 22, 23, 22, 23, 22, 23, 25, 28, 25, 25, 29, 28, 28, 32, 30, 32, 31, 30, 31, 34, 34, 34, 34, 36, 35, 37, 34, 36, 38, 38, 38, 40, 38, 41, 42, 42, 40, 44, 46, 44, 43, 43, 44, 46, 42, 46, 47, 47, 46, 48, 47, 50, 51, 50 ]
[ "nonn" ]
A379729
[ 2, 3, 7, 8, 10, 11, 13, 15, 17, 18, 22, 23, 25, 27, 31, 32, 34, 36, 38, 39, 41, 42, 46, 47, 49, 51, 55, 56, 58, 59, 61, 63, 65, 66, 70, 72, 74, 75, 79, 80, 82, 84, 86, 87, 89, 90, 94, 95, 97, 99, 103, 104, 106, 107, 109, 111, 113, 114, 118, 119, 121, 123, 127 ]
[ "nonn" ]