id
stringlengths
7
11
seq
listlengths
1
347
keywords
listlengths
1
8
A270495
[ 1, 8, 47, 253, 1345, 7304, 41193, 243152, 1506521, 9799547, 66844755, 477297022, 3560469469, 27692022408, 224128400923, 1884299045789, 16427961558365, 148293477761232, 1384008870213057, 13336887952918752, 132535336519342300, 1356662080571809800 ]
[ "nonn" ]
A119193
[ 2, 10, 34, 109, 8189, 108989, 4470645, 32727845, 1095073836189, 1091781620649419000 ]
[ "nonn", "base", "more" ]
A358415
[ 2, 3, 7, 3, 31, 41, 127, 41, 43, 7, 113, 7, 8191, 6, 6, 313, 131071, 211457, 524287, 53, 4217, 433, 41, 547, 2243, 691921, 21275809, 673, 76831, 467, 2147483647, 89, 112337, 401, 17681, 9342799, 12011, 9511, 19, 1061129, 164524721, 54...
[ "nonn" ]
A196282
[ 4, 8, 7, 50, 111, 259, 728, 1800, 4696, 12185, 32136, 83679, 217955, 570882, 1489582, 3896818, 10200627, 26688308, 69841985, 182768771, 478336792, 1251948660, 3276977630, 8577766977, 22452853682, 58772743019, 153844929073, 402711226676 ]
[ "nonn" ]
A196166
[ 3, 10, 21, 12, 36, 55, 30, 78, 105, 56, 136, 171, 90, 210, 253, 132, 300, 15, 351, 182, 406, 465, 240, 528, 35, 595, 306, 666, 741, 44, 380, 820, 63, 462, 65, 552, 99, 650, 756, 119, 143, 870, 40, 152, 195, 255, 70, 230, ...
[ "nonn" ]
A298852
[ 1, 9, 2, 6, 3, 0, 3, 2, 1, 9, 9, 1, 2, 4, 3, 9, 6, 7, 7, 0, 6, 7, 8, 1, 0, 5, 7, 8, 9, 5, 5, 4, 4, 3, 5, 1, 5, 2, 0, 0, 9, 1, 2, 6, 5, 3, 9, 7, 2, 6, 9, 7, 9, 3, 6, 0, 6, 9, 8, 2, 5, 6, 0, 8...
[ "nonn", "easy", "cons" ]
A145049
[ 3037, 3169, 3257, 3769, 4013, 4421, 4793, 4957, 5237, 5297, 5701, 5821, 5881, 6373, 6689, 6761, 6949, 7013, 7213, 7417, 7481, 7549, 7621, 7757, 8389, 8461, 8537, 8681, 8753, 9049, 9133, 9277, 9349, 9733, 10133, 10529, 10601, 11093, 11177, ...
[ "nonn" ]
A230392
[ 233, 929, 2089, 5801, 8353, 11369, 18793, 23201, 33409, 39209, 52201, 59393, 67049, 75169, 92801, 112289, 133633, 156833, 169129, 181889, 222953, 284201, 300673, 317609, 335009, 449153, 469801, 490913, 534529, 557033, 580001, 627329, 651689, 891809, ...
[ "nonn" ]
A071955
[ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12, 13, 14, 15, 16, 17, 18, 19, 0, 9, 0, 23, 24, 25, 26, 27, 28, 29, 0, 5, 9, 0, 34, 35, 36, 37, 38, 39, 0, 13, 18, 9, 0, 45, 46, 47, 48, 49, 0, 6, 2, 18, 9, 0, 56, 57, ...
[ "base", "nonn" ]
A302066
[ 16, 263, 3657, 54177, 807601, 12063625, 180330117, 2696254757, 40316943551, 602872785123, 9015038394948, 134806477346114, 2015832143687688, 30143807918373532, 450756407141792800, 6740400763324758000 ]
[ "nonn" ]
A378037
[ 2, 1, 4, 3, 1, 5, 2, 5, 4, 3, 5, 4, 4, 5, 4, 6, 1, 7, 4, 1, 8, 3, 6, 10, 1, 3, 4, 1, 4, 15, 4, 5, 3, 10, 3, 4, 7, 5, 4, 7, 1, 11, 1, 5, 2, 12, 13, 3, 1, 5, 6, 5, 7, 5, 7, 6, 2, 5, 4, 3, 10, 14, ...
[ "nonn" ]
A317412
[ 78, 348, 666, 820, 860, 1014, 1272, 1326, 1416, 1464, 1482, 1794, 1830, 2010, 2130, 2190, 2262, 2418, 2628, 2844, 2886, 2988, 3198, 3204, 3320, 3354, 3560, 3666, 3738, 4074, 4134, 4602, 4656, 4758, 4848, 4944, 5136, 5226, 5232, 5424, 55...
[ "nonn" ]
A107763
[ 1, 1, 2, 6, 12, 72, 480, 864, 9600, 108000, 312000, 4795200, 46293120, 241056000, 4759413120, 94182359040, 478511953920, 4873965022080, 122634632171520, 799554193966080, 23063946114908160, 664424069072117800, 3198456730188841000, 108184656752428020000, 2.6571461526214...
[ "nonn" ]
A337274
[ 1, 1, 1, 2, 6, 20, 82, 376, 2010, 11788, 77816, 556016, 4366814, 36773666, 335394762, 3251474116, 33770466316, 370474881290, 4317182375632, 52861107601060, 683129289079532, 9234228045432682, 131059243976153400 ]
[ "nonn", "more" ]
A301384
[ 1, 2, 2, 1, 2, 1, 2, 1, 4, 1, 1, 4, 2, 2, 2, 1, 4, 3, 1, 2, 1, 2, 4, 2, 2, 1, 1, 6, 3, 1, 5, 3, 3, 2, 2, 1, 4, 1, 2, 4, 8, 5, 1, 2, 1, 3, 1, 15, 2, 4, 2, 1, 5, 1, 6, 2, 1, 3, 4, 3, 1, 2, 2, ...
[ "nonn" ]
A074493
[ 1, 5, 25, 49, 125, 251, 499, 751, 1249, 4999, 18229, 31249, 49999, 281249, 4218751, 4999999, 9590417, 31622777, 68171507, 74218751, 574218751, 5740883989, 8829261293 ]
[ "base", "nonn" ]
A317434
[ 5, 333, 3666, 39216, 594763, 8362442, 113897676, 1604462254, 22617426590, 316328706838, 4434563566043, 62265370139101, 873270000932177, 12247261303525548, 171818884612080700, 2410224437403048400 ]
[ "nonn" ]
A133221
[ 1, 1, 1, 1, 3, 3, 15, 15, 105, 105, 945, 945, 10395, 10395, 135135, 135135, 2027025, 2027025, 34459425, 34459425, 654729075, 654729075, 13749310575, 13749310575, 316234143225, 316234143225, 7905853580625, 7905853580625, 213458046676875, 213458046676875 ]
[ "nonn" ]
A043890
[ 7, 11, 32, 39, 59, 61, 82, 86, 107, 111, 132, 136, 157, 164, 199, 207, 211, 232, 236, 257, 261, 299, 309, 311, 332, 336, 357, 361, 382, 386, 407, 414, 434, 436, 457, 461, 482, 486, 507, 511, 532, 539, 559, 561, 582, 586, 607...
[ "nonn", "base" ]
A191745
[ 0, 23, 136, 411, 920, 1735, 2928, 4571, 6736, 9495, 12920, 17083, 22056, 27911, 34720, 42555, 51488, 61591, 72936, 85595, 99640, 115143, 132176, 150811, 171120, 193175, 217048, 242811, 270536, 300295, 332160, 366203, 402496, 441111, 482120, 52559...
[ "nonn", "easy" ]
A028480
[ 1, 76, 11989, 2091817, 372713728, 66750320449, 11970180565381, 2147314732677364, 385238046548443200, 69115057977256575000, 1.2399917664600456e+22, 2.2246700617822624e+24, 3.9912836951544486e+26, 7.160768475302283e+28 ]
[ "nonn", "easy" ]
A287232
[ 271, 5596, 231577, 21286940, 4392750641, 2100400533176 ]
[ "nonn", "more" ]
A289085
[ 0, 1, 2, 4, 8, 12, -36, -656, -6016, -45712, -303584, -1614784, -3151424, 89449152, 2020752864, 30106674944, 371094759424, 3803441275648, 27086999353856, -53440551394304, -7360216885479424, -195653223115035650, -3852848368364645400, -62648371228429680000 ]
[ "sign" ]
A359838
[ 0, 1, 3, 3, 1, 2, 1, 262143, 3, 1, 3, 3, 1, 1.532495540865889e+54, 4, 3, 1, 3, 262143, 1, 2, 1, 3, 3, 1 ]
[ "nonn", "base", "cofr" ]
A138484
[ 0, 10, 1011, 3110, 102113, 13311210, 10411223, 1322311410, 1041142322, 3213243110, 1031331422, 2214313310, 1031331422, 2214313310, 1031331422, 2214313310, 1031331422, 2214313310, 1031331422, 2214313310, 1031331422 ]
[ "easy", "nonn", "base" ]
A048047
[ 0, 0, 0, 0, 0, 0, 2, 3, 18, 63, 84, 224, 504, 630, 1270, 2420, 2937, 5742, 12012, 15015, 35035, 84119, 108164, 260064, 601664, 767244, 1720944, 3755844, 4738410, 10329750, 22591800, 28583709, 64071194, 144780009, 184657869 ]
[ "nonn" ]
A169194
[ 1, 37, 1332, 47952, 1726272, 62145792, 2237248512, 80540946432, 2899474071552, 104381066575872, 3757718396731392, 135277862282330110, 4870003042163884000, 175320109517899830000, 6.311523942644394e+21 ]
[ "nonn" ]
A146622
[ 1, 1, 1, 1, 1, 1, 1, 3, 5, 11, 17, 31, 67, 255, 681, 2579, 7475, 30835, 113699, 646479, 2916183, 18956135, 100069407, 770834039, 4965697461, 47266430445, 367691554109, 4176001047493, 38902939183671 ]
[ "nonn" ]
A059178
[ 1, 4, 26, 32, 58, 1361, 4767, 22303, 134563, 188609, 282816, 979804, 1272032, 1330628, 3719474, 5039143, 12531368, 435451235, 5391276884, 6140156718, 24140682996, 30267765913, 56443830660, 176797839116, 645251112512 ]
[ "nonn", "easy", "nice" ]
A266349
[ 1, 1, 1, 2, 1, 1, 1, 4, 3, 2, 2, 1, 1, 1, 1, 8, 7, 6, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 16, 15, 14, 13, 12, 12, 11, 10, 9, 9, 8, 7, 7, 6, 6, 6, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, ...
[ "nonn" ]
A353024
[ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 9, 10, 11, 11, 12, 13, 14, 14, 15, 16, 17, 17, 18, 19, 19, 20, 21, 21, 22, 23, 23, 24, 25, 25, 26, 27, 27, 28, 29, 30, 30, 31, 31, 32, 33, 33, 34, 35, 35, 36, 37, 37, 38, 39, 39,...
[ "nonn" ]
A357291
[ 0, 0, 0, 0, 0, 0, 1, 3, 8, 19, 42, 89, 185, 378, 766, 1544, 3102, 6220, 12459, 24939, 49902, 99831, 199692, 399417, 798871, 1597782, 3195608, 6391264, 12782580, 25565216, 51130493, 102261051, 204522172, 409044419, 818088918, 1636177921, 3272355...
[ "nonn", "easy" ]
A059655
[ 1, 5, 9, 15, 19, 23, 27, 37, 41, 45, 49, 55, 59, 63, 67, 73, 77, 81, 85, 89, 95, 99, 103, 107, 113, 117, 121, 125, 135, 139, 143, 147, 153, 157, 161, 165, 175, 179, 183, 187, 193, 197, 201, 205, 215, 219, 223, 227, 233, ...
[ "nonn" ]
A038197
[ 1, 1, 1, 1, 2, 3, 4, 7, 9, 10, 19, 26, 30, 56, 75, 85, 160, 216, 246, 462, 622, 707, 1329, 1791, 2037, 3828, 5157, 5864, 11021, 14849, 16886, 31735, 42756, 48620, 91376, 123111, 139997, 263108, 354484, 403104, 757588, 1020696, 11606...
[ "easy", "nonn" ]
A013433
[ 0, 1, 15, 495, 28735, 2597175, 337740975, 59815330575, 13857008709375, 4071452200086375, 1480690661198331400, 653488912610356200000, 3.443329336485699e+23, 2.1365703402341567e+26 ]
[ "nonn" ]
A008894
[ 36, 18, 9, 26, 13, 38, 19, 56, 28, 14, 7, 20, 10, 5, 14, 7, 20, 10, 5, 14, 7, 20, 10, 5, 14, 7, 20, 10, 5, 14, 7, 20, 10, 5, 14, 7, 20, 10, 5, 14, 7, 20, 10, 5, 14, 7, 20, 10, 5, 14, 7, 20, 10, 5, 14, 7, ...
[ "nonn", "easy" ]
A126222
[ 1, 0, 1, 1, 0, 1, 0, 4, 0, 1, 2, 0, 11, 0, 1, 0, 15, 0, 26, 0, 1, 5, 0, 69, 0, 57, 0, 1, 0, 56, 0, 252, 0, 120, 0, 1, 14, 0, 364, 0, 804, 0, 247, 0, 1, 0, 210, 0, 1800, 0, 2349, 0, 502, 0, 1, 42, 0, 177...
[ "nonn", "tabl" ]
A054984
[ 427, 553, 595, 623, 737, 871, 913, 923, 1199, 1207, 1241, 1507, 1582, 1817, 1848, 2193, 2226, 2337, 2398, 2407, 2553, 2561, 2728, 2758, 2929, 3016, 3115, 3248, 3346, 3502, 3503, 3598, 3705, 3762, 4171, 4293, 4343, 4462, 4587, 4633, 4841...
[ "nonn" ]
A102337
[ 166392559, 337149859, 1356705139, 1455488059, 1879518709, 2339605519, 2410687039, 2811378079, 3191346019, 3250560139, 3442915309, 3573582079, 4873308619, 4875167959, 5362448719, 5524743379, 5580251359, 5716641649, 5783545759, 5977816549, 6019275469, 6076905349 ]
[ "nonn" ]
A349668
[ 0, 1, 2, 3, 2, 5, 6, 3, 5, 9, 7, 11, 9, 9, 8, 3, 3, 17, 12, 7, 5, 3, 12, 23, 8, 5, 26, 23, 2, 29, 3, 31, 2, 27, 9, 23, 20, 13, 11, 23, 8, 23, 39, 39, 14, 13, 12, 23, 23, 49, 14, 51, 40, 17, 2, 39, 17, 3...
[ "nonn" ]
A166978
[ -1, 6, -4, 0, -16, -24, -64, -120, -256, -504, -1024, -2040, -4096, -8184, -16384, -32760, -65536, -131064, -262144, -524280, -1048576, -2097144, -4194304, -8388600, -16777216, -33554424, -67108864, -134217720, -268435456, -536870904, -1073741824, -21474...
[ "easy", "sign" ]
A137912
[ 1, 2, 3, 4, 5, 4, 6, 7, 8, 5, 9, 10, 11, 5, 12, 13, 14, 7, 16, 17, 18, 8, 19, 6, 20, 21, 22, 9, 23, 24, 25, 26, 27, 6, 28, 29, 7, 30, 31, 11, 32, 33, 34, 35, 36, 12, 37, 38, 39, 40, 41, 8, 13, 42, 43, 44, ...
[ "nonn" ]
A112765
[ 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 2, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 2, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0...
[ "nonn", "easy" ]
A246420
[ 0, 45, 234, 279, 423, 468, 612, 657, 801, 846, 1134, 1179, 1323, 1368, 1512, 1557, 1701, 1746, 1890, 1935, 2034, 2079, 2223, 2268, 2412, 2457, 2601, 2646, 2835, 3123, 3168, 3312, 3357, 3501, 3546, 3735, 3924, 3969, 4023, 4068, 4212, 4...
[ "nonn", "base", "easy" ]
A147382
[ 1, 1, 1, 1, 1, 1, 1, 1, 3, 11, 25, 47, 101, 257, 681, 1819, 5437, 17747, 62109, 244571, 1025085, 4586657, 22318221 ]
[ "nonn" ]
A182780
[ 2, 4, 8, 18, 42, 100, 240, 578, 1394, 3364, 8120, 19602, 47322, 114244, 275808, 665858, 1607522, 3880900, 9369320, 22619538, 54608394, 131836324, 318281040, 768398402, 1855077842, 4478554084, 10812186008, 26102926098, 63018038202, 152139002500, 36729604320...
[ "nonn" ]
A033276
[ 0, 14, 84, 300, 825, 1925, 4004, 7644, 13650, 23100, 37400, 58344, 88179, 129675, 186200, 261800, 361284, 490314, 655500, 864500, 1126125, 1450449, 1848924, 2334500, 2921750, 3627000, 4468464, 5466384, 6643175, 8023575, 9634800, 11506704, 13671944 ]
[ "nonn", "easy" ]
A043734
[ 1, 3, 7, 15, 31, 63, 85, 127, 149, 165, 169, 171, 173, 181, 213, 255, 277, 293, 297, 299, 301, 309, 325, 329, 331, 333, 337, 339, 343, 345, 347, 349, 357, 361, 363, 365, 373, 405, 421, 425, 427, 429, 437, 469, 511, 533, 549,...
[ "nonn", "base" ]
A387529
[ 3, 8, 15, 26, 31, 35, 63, 71, 107, 120, 124, 127, 143, 168, 195, 199, 215, 224, 242, 255, 391, 399, 431, 440, 483, 499, 511, 528, 647, 728, 783, 840, 863, 899, 960, 967, 971, 1023, 1088, 1151, 1155, 1295, 1330, 1351, 1371, 152...
[ "nonn" ]
A127464
[ 29, 101, 109, 151, 199, 211, 239, 251, 389, 491, 571, 631, 641, 809, 811, 1009, 1021, 1039, 1061, 1201, 1229, 1429, 1459, 1481, 1511, 1621, 1721, 2029, 2111, 2131, 2789, 2801, 2909, 2939, 2999, 3121, 3191, 3259, 3461, 3529, 3559, 3571...
[ "nonn" ]
A348629
[ 1, 6, 10, 12, 18, 24, 30, 42, 48, 54, 60, 78, 84, 90, 96, 120, 168, 192, 210, 240, 270, 312, 330, 360, 384, 420, 480, 630, 672, 840, 960, 1056, 1080, 1248, 1320, 1440, 1560, 1680, 1890, 1920, 2280, 2310, 2400, 2520, 2640, 2688...
[ "nonn" ]
A179513
[ 1, 5, 26, 179, 1600, 18299, 258850, 4407623, 88463546, 2056904519, 54625874590, 1637606381371, 54871264668362 ]
[ "nonn" ]
A381964
[ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 30, 22, 24, 26, 28, 30, 32, 34, 36, 39, 42, 33, 35, 37, 39, 41, 43, 45, 48, 51, 54, 44, 46, 48, 50, 52, 54, 57, 60, 63, 66, 55, 57, 59, 61, 63...
[ "nonn", "base", "easy" ]
A095848
[ 1, 2, 4, 6, 12, 24, 48, 60, 120, 240, 360, 420, 840, 1680, 2520, 5040, 10080, 15120, 25200, 27720, 55440, 110880, 166320, 277200, 360360, 720720, 1441440, 2162160, 3603600, 7207200, 10810800, 12252240, 24504480, 36756720, 61261200, 122522400 ]
[ "nonn" ]
A073866
[ 4, 6, 8, 9, 28, 39, 68, 69, 88, 99, 299, 399, 589, 699, 799, 899, 999, 2899, 3999, 5999, 6999, 7999, 9899, 9999, 29999, 39999, 58999, 69999, 89999, 99999, 299899, 399999, 499999, 689999, 699999, 889999, 999999, 1999999, 3899999, 3999999, ...
[ "base", "nonn" ]
A015789
[ 4, 10, 20, 24, 30, 44, 68, 92, 120, 136, 164, 184, 212, 236, 350, 356, 374, 376, 428, 472, 524, 596, 664, 668, 808, 856, 904, 932, 1028, 1076, 1150, 1172, 1192, 1336, 1388, 1410, 1436, 1528, 1532, 1604, 1676, 1864, 1868, 2008, 2...
[ "nonn" ]
A131801
[ 1, 3, 9, 15, 27, 45, 105, 81, 135, 225, 315, 1155, 243, 405, 675, 945, 1575, 3465, 15015, 729, 1215, 2025, 3375, 2835, 4725, 10395, 11025, 17325, 45045, 255255, 2187, 3645, 6075, 10125, 8505, 14175, 23625, 31185, 33075, 51975, 121275, ...
[ "easy", "tabf", "nonn" ]
A072393
[ 91, 874, 3411, 9093, 40112, 44252, 54081, 67284, 80224, 90933, 91503, 4961782, 5400081, 5726691, 8750834, 9076921, 9155055, 54000081, 62023914, 90766921, 93079231, 430770922, 540000081, 636355044, 808618664, 907666921, 928709013, 4050394312, 4262971312 ]
[ "base", "nonn" ]
A338224
[ 1, 2, 3, 5, 7, 6, 11, 13, 17, 14, 19, 15, 23, 22, 21, 29, 31, 34, 37, 35, 33, 38, 41, 39, 43, 46, 47, 55, 53, 42, 59, 61, 57, 62, 77, 85, 67, 74, 69, 91, 71, 66, 73, 95, 119, 82, 79, 87, 83, 86, 93, 115, 89, 94...
[ "nonn", "mult" ]
A336193
[ 1, 2, 3, 4, 10, 11, 12, 20, 30, 5, 6, 7, 13, 14, 21, 22, 31, 40, 50, 8, 15, 16, 23, 24, 32, 33, 41, 51, 60, 9, 17, 25, 26, 34, 42, 43, 52, 61, 100, 18, 27, 35, 36, 44, 53, 101, 102, 110, 120, 19, 28, 37, 45, 10...
[ "nonn", "base", "look" ]
A283140
[ 1, 1, 1, 101, 101, 10001, 11101, 1011101, 1010101, 100010101, 111000001, 10111011001, 10100001101, 1000100110001, 1110001001101, 101110100100101, 101000100101101, 10001010001100100, 11100000010001000, 1011101111011100200, 1010000110011100000 ]
[ "nonn", "easy" ]
A384174
[ 409, 653, 881, 1091, 1489, 1913, 1993, 2039, 2729, 3677, 4073, 5039, 5507, 5683, 5849, 7349, 7789, 7907, 8419, 8623, 8689, 9973, 10429, 11057, 11617, 11689, 11821, 12527, 13367, 14033, 15259, 15511, 15629, 16139, 17569, 17881, 17911, 19373, ...
[ "nonn", "base" ]
A254912
[ 219706, 146168, 56618, 38461, 21730, 20173, 16945, 15221, 16516, 19402, 21128, 24860, 29918, 34438, 41417, 48432, 55653, 65527, 77019, 90158, 104074, 120406, 139028, 160707, 185166, 210852, 239269, 271368, 307712, 348186, 390329, 436989 ]
[ "nonn" ]
A024989
[ 1, 4, 11, 18, 32, 52, 78, 107, 147, 187, 215, 266, 329, 394, 439, 477, 571, 653, 736, 821, 918, 999, 1047, 1185, 1341, 1451, 1485, 1570, 1743, 1917, 2080, 2208, 2344, 2412, 2489, 2778, 3033, 3176, 3146, 3271, 3589, 3858, 4083, 424...
[ "nonn" ]
A082540
[ 1, 15, 79, 239, 607, 1199, 2303, 3823, 6223, 9279, 13919, 19183, 27007, 35743, 47519, 60735, 78719, 97103, 122447, 148527, 181839, 216959, 262543, 306863, 365343, 423855, 495855, 569055, 661679, 748527, 862047, 972191, 1104831, 1237247 ]
[ "nonn" ]
A242214
[ 16, 22, 34, 37, 42, 43, 47, 48, 52, 59, 63, 67, 69, 73, 74, 79, 84, 86, 87, 89, 93, 94, 99, 101, 102, 103, 106, 107, 109, 112, 115, 116, 117, 118, 123, 124, 126, 127, 128, 131, 134, 135, 138, 141, 143, 145, 149, 152, 159...
[ "nonn", "base", "less" ]
A237641
[ 5, 236681, 380071, 457651, 563249, 1441199, 1660231, 2491661, 3050261, 4106701, 5137021, 5146091, 5329171, 10617821, 15574861, 19860391, 20852921, 21349019, 21497131, 23025601, 24507449, 32495699, 36342811, 48867089, 51129649, 59082281 ]
[ "nonn" ]
A033450
[ 74453, 74471, 74489, 74507, 76543, 76561, 76579, 76597, 132893, 132911, 132929, 132947, 182243, 182261, 182279, 182297, 202823, 202841, 202859, 202877, 297403, 297421, 297439, 297457, 358793, 358811, 358829, 358847, 485923, 485941, 485959, 485977 ]
[ "nonn", "tabf" ]
A018882
[ 0, 1, 7, 9, 23, 3, 6, 49, 31, 5, 2, 32, 81, 13, 26, 33, 21, 42, 67, 85, 17, 43, 86, 109, 69, 11, 22, 35, 7, 28, 56, 89, 71, 113, 9, 18, 36, 72, 91, 182, 115, 23, 29, 58, 116, 232, 185, 147, 37, 74, 148, 59, 47, ...
[ "nonn", "base" ]
A324211
[ 2, 4, 16, 24, 30, 60, 72, 96, 128, 180, 192, 240, 256, 288, 432, 576, 720, 840, 900, 1080, 1536, 1920, 2048, 2310, 2520, 2592, 3072, 3360, 3456, 3600, 3840, 4320, 4608, 4620, 5184, 5400, 5760, 6480, 6720, 6912, 8192, 8640, 9216, 1...
[ "nonn", "base" ]
A160481
[ -1, -10, -264, -13392, -1111680, -137030400, -23500108800, -5351202662400, -1562069156659200, -568747270103040000, -252681700853514240000, -1.3453993877843313e+23, -8.457337019947551e+25, -6.197270496634477e+28, -5.236196051634133e+31 ]
[ "easy", "sign", "uned" ]
A218333
[ 5, 5, 8, 10, 2, 12, 7, 4, 37, 23, 5, 51, 3, 6, 34, 23, 5, 57, 9, 22, 49, 66, 64, 54, 5, 56, 43, 28, 46, 116, 56, 232, 92, 170, 65, 206, 181, 379, 170, 511, 190, 416, 187, 448, 89, 143, 200, 159, 434, 670, 145, 1081...
[ "nonn" ]
A298537
[ 1, 1, 2, 3, 6, 10, 25, 49, 127, 291, 766, 1843, 5003, 12487, 34151, 87983, 242088, 634848, 1763749, 4688677, 13085621, 35241441, 98752586, 268282856, 755353825, 2067175933, 5837592853, 16087674276, 45550942142, 126186554309, 358344530763, 997171512999 ]
[ "nonn" ]
A191112
[ 1, 3, 12, 42, 165, 3000, 2142, 39270, 838695, 2185092, 194467182, 649154415, 33547795512, 40753286805, 24563658547425, 1364238471026340, 2297427262231332, 1662166966658270200, 783186317937632600, 404695317060455760000, 1.6229353319214244e+23, 6.343572278139585e+23 ]
[ "nonn" ]
A197909
[ 1024, 9537, 169351, 1922602, 14455511, 79525194, 345716131, 1253815680, 3941971041, 11046221255, 28162516240, 66354069278, 146236468528, 304356025990, 602797997503, 1143224193789, 2086847748927, 3682210047877, 6303034667439, 10498899284253, 17061992477839 ]
[ "nonn", "easy" ]
A277985
[ 6, 24, 204, 546, 1050, 1716, 2544, 3534, 4686, 6000, 7476, 9114, 10914, 12876, 15000, 17286, 19734, 22344, 25116, 28050, 31146, 34404, 37824, 41406, 45150, 49056, 53124, 57354, 61746, 66300, 71016, 75894, 80934, 86136, 91500, 97026, 102714, 1...
[ "nonn", "easy" ]
A150499
[ 1, 2, 7, 25, 101, 414, 1773, 7680, 34057, 152318, 691123, 3155131, 14542211, 67335592, 313918629, 1468784715, 6907256265, 32576947186, 154246370247, 732063794715, 3485212334985, 16625249152040, 79505580723451, 380849840954336, 1828140085391091, 8787957308824254, 4...
[ "nonn", "walk" ]
A100762
[ 1, 2, 1, 4, 1, 2, 1, 8, 9, 2, 1, 12, 1, 2, 1, 16, 1, 18, 1, 4, 1, 2, 1, 24, 1, 2, 27, 4, 1, 2, 1, 32, 1, 2, 1, 36, 1, 2, 1, 8, 1, 2, 1, 4, 9, 2, 1, 48, 1, 2, 1, 4, 1, 54, 1, 8, 1, 2, 1, 12, 1, 2...
[ "nonn" ]
A271526
[ 6, 9, 3, 2, 8, 2, 6, 0, 3, 9, 0, 3, 5, 7, 4, 1, 0, 1, 6, 4, 2, 4, 3, 9, 0, 2, 7, 5, 8, 3, 8, 8, 4, 6, 4, 1, 9, 2, 1, 9, 7, 3, 1, 3, 7, 7, 6, 4, 5, 8, 2, 1, 0, 2, 6, 0, 9, 6, 5, 5, 1, 0, 6, 5...
[ "nonn", "cons" ]
A058432
[ 36, 3030633036360366000, 6.30366666363306e+32 ]
[ "nonn", "base", "hard", "more", "bref" ]
A333290
[ 1, 1, -1, 1, -1, -1, 1, 1, -1, -1, 0, 1, 1, -1, 1, -1, -1, 0, 0, 2, 0, 0, -1, -1, 1, 1, -1, -1, 0, 0, 1, 1, 1, -1, -1, -1, 0, 0, 1, 1, -1, 1, -1, -1, 0, 0, 1, 0, 2, 0, -1, -1, -1, -1, 0, 2, 0, 1, 0, ...
[ "sign", "tabf" ]
A266170
[ 0, 0, 1, 0, 0, 0, 5, 2127, 91845941 ]
[ "nonn", "more" ]
A084155
[ 0, 1, 4, 19, 88, 401, 1804, 8051, 35760, 158401, 700564, 3095731, 13673224, 60375953, 266559388, 1176763859, 5194762080, 22931453953, 101225940772, 446836798675, 1972442421688, 8706804701201, 38433749994028 ]
[ "easy", "nonn" ]
A296560
[ 1, 1, 1, 2, 1, 4, 1, 4, 6, 6, 1, 12, 1, 8, 16, 8, 1, 28, 1, 24, 30, 10, 1, 32, 22, 12, 44, 40, 1, 96, 1, 16, 48, 14, 68, 96, 1, 16, 70, 80, 1, 220, 1, 60, 204, 18, 1, 80, 90, 168, 96, 84, 1, 224, 146, 160, ...
[ "nonn" ]
A350401
[ 3, 5, 7, 11, 13, 23, 29, 31, 53, 59, 71, 73, 83, 89, 101, 107, 109, 127, 137, 149, 163, 173, 181, 191, 193, 211, 223, 227, 233, 239, 257, 271, 277, 281, 283, 307, 317, 367, 373, 389, 409, 419, 431, 449, 461, 463, 467, 479,...
[ "nonn", "base" ]
A011373
[ 0, 1, 1, 1, 2, 2, 1, 3, 3, 2, 5, 4, 2, 5, 6, 4, 8, 7, 4, 5, 8, 6, 8, 11, 6, 6, 9, 11, 11, 12, 8, 11, 9, 13, 12, 11, 12, 14, 10, 12, 16, 17, 14, 16, 18, 15, 21, 13, 12, 18, 18, 17, 17, 17, 16, 22, 21, 16...
[ "nonn", "base" ]
A112945
[ 0, 6, 468, 80600, 16016560, 3360790440, 728936019504, 161858688461184, 36580777518027600, 8382066029146610000, 1.9419719567895503e+21, 4.540064890728439e+23, 1.0694413291912451e+26 ]
[ "nonn" ]
A352380
[ 9, 18, 19, 23, 26, 29, 69, 83, 89, 143, 149, 158, 159, 163, 166, 169, 186, 193, 196, 199, 203, 209, 219, 223, 229, 233, 236, 249, 253, 258, 260, 263, 269, 283, 286, 289, 290, 293, 298, 299, 319, 323, 326, 669, 683, 689, 743,...
[ "base", "nonn" ]
A140282
[ 0, 4, 8, 9, 13, 17, 18, 22, 26, 27, 31, 35, 36, 40, 44, 45, 49, 53, 54, 58, 62, 63, 67, 71, 72, 76, 80, 81, 85, 89, 90, 94, 98, 99, 103, 107, 108, 112, 116, 117, 121, 125, 126, 130, 134, 135, 139, 143, 144, 148, 152,...
[ "nonn", "easy" ]
A031484
[ 49, 98, 147, 196, 245, 344, 345, 346, 347, 348, 350, 357, 364, 371, 378, 392, 441, 490, 539, 588, 687, 688, 689, 690, 691, 693, 700, 707, 714, 721, 735, 784, 833, 882, 931, 1030, 1031, 1032, 1033, 1034, 1036, 1043, 1050, 1057 ]
[ "nonn", "base" ]
A114203
[ 1, 2, 4, 8, 18, 44, 110, 272, 662, 1596, 3838, 9240, 22286, 53812, 129974, 313888, 757878, 1829644, 4416910, 10662952, 25742302, 62147556, 150038438, 362226480, 874493446, 2111213372, 5096916094, 12305037368, 29706982638, 71719002644, 173145004310, 41800...
[ "easy", "nonn" ]
A113151
[ 3, 5, 11, 23, 53, 59, 83, 89, 149, 191, 263, 269, 293, 353, 359, 389, 401, 419, 431, 443, 461, 479, 521, 599, 653, 683, 761, 809, 821, 881, 941, 971, 983, 1013, 1061, 1091, 1103, 1151, 1181, 1193, 1283, 1511, 1571, 1613, 1619, ...
[ "nonn" ]
A007613
[ 1, 2, 22, 170, 1366, 10922, 87382, 699050, 5592406, 44739242, 357913942, 2863311530, 22906492246, 183251937962, 1466015503702, 11728124029610, 93824992236886, 750599937895082, 6004799503160662, 48038396025285290, 384307168202282300, 3074457345618258400 ]
[ "nonn", "easy" ]
A126294
[ 1, 1, 2, 3, 4, 8, 16, 17, 32, 40, 44, 60, 88, 100 ]
[ "nonn" ]
A318659
[ 0, 0, 1, 0, 1, 0, 1, 0, 3, 0, 1, 0, 1, 0, 2, 0, 1, 0, 1, 0, 2, 0, 1, 0, 3, 0, 4, 0, 1, 0, 1, 0, 2, 0, 2, 0, 1, 0, 2, 0, 1, 0, 1, 0, 4, 0, 1, 0, 3, 0, 2, 0, 1, 0, 2, 0, 2, 0, 1, 0, 1, 0, 4, 0...
[ "nonn" ]
A083648
[ 7, 8, 3, 4, 3, 0, 5, 1, 0, 7, 1, 2, 1, 3, 4, 4, 0, 7, 0, 5, 9, 2, 6, 4, 3, 8, 6, 5, 2, 6, 9, 7, 5, 4, 6, 9, 4, 0, 7, 6, 8, 1, 9, 9, 0, 1, 4, 6, 9, 3, 0, 9, 5, 8, 2, 5, 5, 4, 1, 7, 8, 2, 2, 7...
[ "cons", "nonn" ]
A099110
[ 1, 8, 47, 238, 1113, 4956, 21379, 90266, 375485, 1545544, 6313671, 25650534, 103792417, 418745972, 1685723723, 6775136242, 27197312709, 109079641440, 437189912335, 1751374038590, 7013340021161, 28076893083148 ]
[ "nonn", "easy" ]
A055800
[ 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 2, 2, 1, 0, 1, 1, 1, 2, 2, 1, 0, 0, 1, 1, 1, 2, 3, 4, 3, 1, 0, 1, 1, 1, 2, 3, 4, 3, 1, 0, 0, 1, 1, 1, 2, 3, 5, 7, 7, 4...
[ "nonn", "tabl" ]
A240413
[ 5, 10, 32, 80, 162, 493, 1109, 2656, 7235, 16492, 41839, 106203, 251488, 640167, 1579481, 3845121, 9681356, 23735901, 58568055, 145990039, 358605440, 888720845, 2202562818, 5427876319, 13455220186, 33269176662, 82172839773, 203518046217 ]
[ "nonn" ]
A146884
[ 7, 49, 301, 1813, 10885, 65317, 391909, 2351461, 14108773, 84652645, 507915877, 3047495269, 18284971621, 109709829733, 658258978405, 3949553870437, 23697323222629, 142183939335781, 853103636014693, 5118621816088165 ]
[ "nonn", "easy", "less" ]