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int64
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int64
-14,827
666,262,453B
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1999-12-11 03:00:00
2025-07-19 00:40:46
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32
32
A355701
a(n) = Product of prime(k+1) where k runs through the exponents of the positions 2^k of the 1-bits in A354169(n).
[ "1", "2", "3", "5", "7", "6", "11", "13", "17", "35", "19", "23", "29", "22", "31", "39", "37", "41", "43", "85", "47", "133", "53", "59", "61", "667", "67", "71", "73", "62", "79", "33", "83", "481", "89", "97", "101", "1763", "103", "107", "109", "235", "113", "119", "127", "1007", "131", "137", "139", "3599", "149", "151", "157", "1541", "163", "2059", "167", "173", "179" ]
[ "nonn" ]
12
0
2
[ "A005117", "A090252", "A354169", "A355701" ]
null
Michael De Vlieger, Jul 14 2022
2022-07-17T11:41:40
oeisdata/seq/A355/A355701.seq
40a31140403c38fd4aeeec5ac6475d1a
A355702
a(1) = 1, a(2) = 2; for n > 2, a(n) is the smallest positive number that has not yet appeared that has the same number of prime divisors as the sum a(n-2) + a(n-1).
[ "1", "2", "3", "5", "8", "7", "4", "11", "6", "13", "17", "12", "19", "23", "18", "29", "31", "16", "37", "41", "20", "43", "27", "28", "9", "47", "24", "53", "10", "30", "36", "42", "44", "14", "15", "59", "21", "32", "61", "22", "67", "71", "45", "50", "25", "52", "26", "63", "73", "40", "79", "33", "48", "54", "66", "72", "68", "56", "70", "60", "75", "81", "84", "76", "64", "88", "90", "34", "78", "80", "35", "38", "83", "39", "46", "49", "51" ]
[ "nonn" ]
12
1
2
[ "A001222", "A352867", "A355647", "A355649", "A355702", "A356017" ]
null
Scott R. Shannon, Jul 14 2022
2022-07-23T09:54:27
oeisdata/seq/A355/A355702.seq
e969d848046b5408b81dc19d023b3623
A355703
a(n) = binomial(n, floor(log(n))).
[ "1", "1", "3", "4", "5", "6", "7", "28", "36", "45", "55", "66", "78", "91", "105", "120", "136", "153", "171", "190", "1330", "1540", "1771", "2024", "2300", "2600", "2925", "3276", "3654", "4060", "4495", "4960", "5456", "5984", "6545", "7140", "7770", "8436", "9139", "9880", "10660", "11480", "12341", "13244", "14190", "15180", "16215", "17296", "18424", "19600", "20825" ]
[ "nonn" ]
32
1
3
[ "A000195", "A001405", "A007318", "A051033", "A051036", "A051052", "A051053", "A355703" ]
null
Christoph B. Kassir, Jul 14 2022
2025-06-16T23:49:31
oeisdata/seq/A355/A355703.seq
846f21eb4d3dcb91e445521f44771848
A355704
Indices k of partition function p where p(k) and p(k) + 2 are twin primes.
[ "3", "4", "6", "13", "2335166" ]
[ "nonn", "hard", "more" ]
20
1
1
[ "A000041", "A046063", "A072213", "A284594", "A285086", "A285087", "A285088", "A355704", "A355705", "A355706" ]
null
Serge Batalov, Jul 14 2022
2022-07-26T01:34:30
oeisdata/seq/A355/A355704.seq
7fc99c1e99c98ecb8d045fc5af96aad3
A355705
Indices k of partition function p where p(k) and p(k) - 2 are twin primes.
[ "4", "5", "186", "3542" ]
[ "nonn", "hard", "more" ]
17
1
1
[ "A000041", "A046063", "A072213", "A284594", "A285086", "A285087", "A285088", "A355704", "A355705", "A355706" ]
null
Serge Batalov, Jul 15 2022
2022-07-26T01:34:35
oeisdata/seq/A355/A355705.seq
52f2e9aecf771d4069c65d112d506f31
A355706
Indices k of partition function p where p(k) is a twin prime.
[ "3", "4", "5", "6", "13", "186", "3542", "2335166" ]
[ "nonn", "hard", "more" ]
25
1
1
[ "A000041", "A046063", "A072213", "A284594", "A285086", "A285087", "A285088", "A355704", "A355705", "A355706" ]
null
Serge Batalov, Jul 15 2022
2022-07-26T01:34:40
oeisdata/seq/A355/A355706.seq
0b6235729600d312c51ddd3be4d22b62
A355707
Nonsquare numbers k such that tau(sigma(tau(k))) = sigma(tau(sigma(k))), where tau is A000005 and sigma is A000203.
[ "786432", "3500658", "41641938", "75031250", "121773618", "175781250", "408008178", "892531250", "1031215698" ]
[ "nonn", "more" ]
26
1
1
[ "A000005", "A000037", "A000203", "A076361", "A237613", "A355707" ]
null
Mohammed Yaseen, Jul 14 2022
2022-07-18T14:18:02
oeisdata/seq/A355/A355707.seq
b268a3da2eb9c977c0645b4648f8d126
A355708
Irregular triangle read by rows in which row n lists the possible periods for the iterations of the map sum of n-th powers of digits.
[ "1", "1", "8", "1", "2", "3", "1", "2", "7", "1", "2", "4", "6", "10", "12", "22", "28", "1", "2", "3", "4", "10", "30", "1", "2", "3", "6", "12", "14", "21", "27", "30", "56", "92", "1", "25", "154", "1", "2", "3", "4", "8", "10", "19", "24", "28", "30", "80", "93", "1", "6", "7", "17", "81", "123" ]
[ "nonn", "tabf", "base", "more" ]
14
1
3
[ "A003132", "A007953", "A031176", "A031178", "A031182", "A031186", "A031195", "A031200", "A031211", "A031212", "A031213", "A055012", "A055013", "A055014", "A055015", "A123253", "A210840", "A355708" ]
null
Mohammed Yaseen, Jul 14 2022
2025-02-16T08:34:03
oeisdata/seq/A355/A355708.seq
926a968c23ebb046212f29d014b868ed
A355709
Numbers k such that k and k+1 have the same number of 3-smooth divisors.
[ "2", "14", "21", "33", "38", "44", "50", "57", "69", "74", "80", "86", "93", "99", "105", "110", "116", "122", "129", "135", "141", "146", "158", "165", "171", "177", "182", "194", "201", "213", "218", "230", "237", "249", "254", "260", "266", "273", "285", "290", "296", "302", "309", "315", "321", "326", "332", "338", "345", "357", "362", "374", "381", "387", "393", "398" ]
[ "nonn" ]
10
1
1
[ "A005237", "A006049", "A072078", "A332386", "A343819", "A344312", "A344313", "A344314", "A348345", "A355709", "A355710" ]
null
Amiram Eldar, Jul 15 2022
2022-07-19T08:02:48
oeisdata/seq/A355/A355709.seq
cc5232bad7329f4fec2a716cc0fff736
A355710
Numbers k such that k and k+1 have the same number of 5-smooth divisors.
[ "2", "21", "33", "34", "38", "57", "85", "86", "93", "94", "104", "116", "122", "141", "145", "146", "154", "158", "171", "177", "182", "189", "201", "205", "213", "214", "218", "237", "265", "266", "273", "296", "302", "321", "326", "332", "334", "338", "344", "357", "362", "381", "385", "387", "393", "394", "398", "417", "445", "446", "453", "454", "475", "476", "482" ]
[ "nonn" ]
11
1
1
[ "A005237", "A006049", "A332386", "A343819", "A344312", "A344313", "A344314", "A348345", "A355583", "A355709", "A355710", "A355711", "A355712" ]
null
Amiram Eldar, Jul 15 2022
2022-07-19T08:03:00
oeisdata/seq/A355/A355710.seq
d8dfcf5fee22fcde40bcd3812a1c5882
A355711
Starts of runs of 3 consecutive numbers with the same number of 5-smooth divisors.
[ "33", "85", "93", "145", "213", "265", "393", "445", "453", "475", "505", "633", "685", "753", "805", "813", "865", "933", "985", "993", "1045", "1113", "1165", "1293", "1345", "1353", "1405", "1430", "1533", "1585", "1624", "1653", "1705", "1713", "1765", "1833", "1885", "1893", "1945", "2013", "2065", "2193", "2245", "2253", "2275", "2305", "2433", "2485" ]
[ "nonn" ]
9
1
1
[ "A005238", "A006073", "A045939", "A332313", "A332387", "A355583", "A355710", "A355711", "A355712" ]
null
Amiram Eldar, Jul 15 2022
2022-07-19T07:27:28
oeisdata/seq/A355/A355711.seq
46f6f50785f8a9f2335bf59de461b88f
A355712
Starts of runs of 4 consecutive numbers with the same number of 5-smooth divisors.
[ "28374", "133623", "136374", "187623", "190374", "298374", "349623", "352374", "457623", "460374", "511623", "619623", "622374", "673623", "676374", "781623", "838374", "943623", "946374", "997623", "1000374", "1108374", "1159623", "1162374", "1267623", "1270374", "1321623", "1429623", "1432374", "1483623", "1486374", "1591623" ]
[ "nonn" ]
10
1
1
[ "A006601", "A332314", "A332388", "A355583", "A355710", "A355711", "A355712" ]
null
Amiram Eldar, Jul 15 2022
2022-07-19T08:03:05
oeisdata/seq/A355/A355712.seq
d98d6b70f52e851ef544552da725c036
A355713
Numbers k such that k and k+1 have the same sum of 5-smooth divisors.
[ "175", "2224", "2575", "4975", "7024", "9424", "9775", "11824", "12175", "14224", "14575", "16975", "19024", "21424", "21775", "23824", "24175", "26224", "26575", "28975", "31024", "33424", "33775", "35824", "36175", "38224", "38575", "40975", "43024", "45424", "45775", "47824", "48175", "50224", "50575", "52975", "55024", "57424", "57775" ]
[ "nonn" ]
13
1
1
[ "A000203", "A002961", "A013929", "A018255", "A064115", "A064125", "A068781", "A293183", "A306985", "A333949", "A355584", "A355713" ]
null
Amiram Eldar, Jul 15 2022
2022-11-25T11:05:14
oeisdata/seq/A355/A355713.seq
f4b96c4247306dd0ac6dcc9bdd4dfbcf
A355714
Numbers k > 0 such that A090252(A355176(k)) does not equal prime(k)^2.
[ "1", "2", "16", "26", "32", "35", "40", "59", "60", "69", "92", "105", "110", "112", "113", "137", "167", "169", "178", "185", "186", "188", "207", "210", "260", "261", "274", "287", "289", "342", "344", "346", "356", "357", "359", "361", "362", "363", "391", "412", "417", "434", "457", "477", "478", "479", "480", "481", "492", "547", "563", "598", "663", "666", "671" ]
[ "nonn" ]
40
1
2
[ "A000040", "A001248", "A090252", "A354169", "A355176", "A355714" ]
null
Thomas Scheuerle, Jul 15 2022
2022-07-16T01:06:27
oeisdata/seq/A355/A355714.seq
5611a4b2fc43b119ecf598b0bc0b9850
A355715
a(0) = 0; for n > 0, a(n) is the total number of binary bits that n has in common with all previous terms.
[ "0", "0", "2", "1", "3", "2", "7", "8", "8", "9", "16", "15", "17", "17", "18", "19", "32", "35", "39", "42", "33", "36", "40", "40", "50", "50", "57", "57", "50", "49", "53", "54", "92", "91", "94", "93", "85", "87", "89", "90", "101", "105", "106", "113", "103", "109", "108", "116", "143", "146", "144", "149", "145", "151", "146", "153", "161", "169", "161", "170", "159", "169", "158", "170", "184", "192", "187", "194", "181" ]
[ "nonn", "base" ]
12
0
3
[ "A030190", "A342303", "A351753", "A355374", "A355715" ]
null
Scott R. Shannon, Jul 15 2022
2022-07-19T08:04:00
oeisdata/seq/A355/A355715.seq
562516c8864fbfadffb5387769408262
A355716
a(n) is the smallest number that has exactly n binary palindrome divisors (A006995).
[ "1", "3", "9", "15", "99", "45", "135", "189", "315", "495", "945", "765", "2079", "6237", "3465", "5355", "4095", "8415", "31185", "20475", "25245", "12285", "85995", "58905", "61425", "45045", "69615", "176715", "446985", "225225", "328185", "208845", "135135", "405405", "528255", "1396395", "675675", "2027025", "765765", "5360355", "2993445", "3968055", "3828825" ]
[ "nonn", "base" ]
31
1
2
[ "A006995", "A175242", "A329419", "A329420", "A355716" ]
null
Bernard Schott, Jul 15 2022
2022-07-23T19:23:59
oeisdata/seq/A355/A355716.seq
7e5151406aa40e8d2109aa5fea42fa41
A355717
Smallest number of generalized pentagonal numbers which sum to n.
[ "0", "1", "1", "2", "2", "1", "2", "1", "2", "2", "2", "3", "1", "2", "2", "1", "2", "2", "3", "2", "2", "3", "1", "2", "2", "3", "1", "2", "2", "2", "2", "2", "3", "2", "2", "1", "2", "2", "2", "3", "1", "2", "2", "3", "2", "2", "3", "2", "2", "3", "2", "1", "2", "2", "3", "2", "2", "1", "2", "2", "3", "2", "2", "2", "2", "3", "2", "3", "3", "2", "1", "2", "2", "2", "3", "2", "3", "1", "2", "2", "2", "3", "2", "2", "2", "2", "2", "3", "3", "2", "3", "2", "1", "2", "2", "3", "2", "2", "3", "2", "1" ]
[ "nonn" ]
59
0
4
[ "A001318", "A093519", "A100878", "A355717" ]
null
Bernard Schott, Jul 15 2022
2025-03-22T23:34:27
oeisdata/seq/A355/A355717.seq
751b05dbf4fe9c997584a2e836f5f3fc
A355718
Expansion of e.g.f. exp( x/(1 + log(1-x)) ).
[ "1", "1", "3", "16", "117", "1071", "11725", "149122", "2158401", "35006941", "628552231", "12372376116", "264849067549", "6124239060915", "152099146415385", "4037206919213686", "114038575520545153", "3415098936831144537", "108065651366801837611", "3602585901321224507992" ]
[ "nonn" ]
12
0
3
[ "A007840", "A052860", "A355718", "A355719", "A355720" ]
null
Seiichi Manyama, Jul 15 2022
2022-07-15T15:04:28
oeisdata/seq/A355/A355718.seq
e6dd3c2e2621fb4b8756a86e6eb02a19
A355719
Expansion of e.g.f. exp( x/(1 - log(1+x)) ).
[ "1", "1", "3", "10", "45", "231", "1405", "9472", "72177", "596845", "5442631", "53052726", "561826309", "6286949787", "75704999721", "954108249676", "12862823623393", "179921659771257", "2683989118991467", "41178997678745506", "673670267643931581", "11223738258484213519", "200027545794685345749" ]
[ "sign" ]
16
0
3
[ "A006252", "A108125", "A355718", "A355719", "A355720" ]
null
Seiichi Manyama, Jul 15 2022
2022-07-15T15:04:41
oeisdata/seq/A355/A355719.seq
ca8730c192f05a0639a01673a4ca3aa4
A355720
Expansion of e.g.f. exp( x/(2 - exp(x)) ).
[ "1", "1", "3", "16", "113", "986", "10237", "123096", "1680737", "25668766", "433329461", "8009178596", "160802065393", "3483842906610", "80992799730221", "2010720004254856", "53081510001375041", "1484613248976841958", "43846812123456425221", "1363477059263944382604" ]
[ "nonn" ]
17
0
3
[ "A000248", "A000670", "A052882", "A075729", "A355718", "A355719", "A355720" ]
null
Seiichi Manyama, Jul 15 2022
2022-07-15T15:05:02
oeisdata/seq/A355/A355720.seq
067498dfa43bef4d9b8c826dfd33df61
A355721
Square table, read by antidiagonals: the g.f. for row n is given recursively by (2*n-1)*x*R(n,x) = 1 + (2*n-3)*x - 1/R(n-1,x) for n >= 1 with the initial value R(0,x) = Sum_{k >= 0} A112934(k+1)*x^k.
[ "1", "1", "2", "1", "2", "6", "1", "2", "10", "26", "1", "2", "14", "74", "158", "1", "2", "18", "138", "706", "1282", "1", "2", "22", "218", "1686", "8162", "13158", "1", "2", "26", "314", "3194", "24162", "110410", "163354", "1", "2", "30", "426", "5326", "53890", "394254", "1708394", "2374078", "1", "2", "34", "554", "8178", "102722", "1019250", "7191018", "29752066", "39456386" ]
[ "nonn", "tabl", "easy" ]
13
0
3
[ "A000698", "A001147", "A111528", "A112934", "A355721", "A355722", "A355723", "A355724", "A355725" ]
null
Peter Bala, Jul 15 2022
2022-07-18T19:47:17
oeisdata/seq/A355/A355721.seq
7dd8a100e7c93604c1237449cb4cdc4c
A355722
Row 2 of table A355721.
[ "1", "2", "14", "138", "1686", "24162", "394254", "7191018", "144786006", "3188449602", "76246683534", "1968284351178", "54576250392726", "1618348891438242", "51122453577462414", "1714406473587300138", "60843580566100937046", "2278637898592632599682", "89818339421620249242894", "3717488491001699691500298" ]
[ "nonn", "easy" ]
4
0
2
[ "A000698", "A001147", "A112934", "A355721", "A355722", "A355723", "A355724", "A355725" ]
null
Peter Bala, Jul 15 2022
2022-07-18T19:47:36
oeisdata/seq/A355/A355722.seq
f0fa6357509eaf9141109fdfd9a6ede0
A355723
Row 3 of table A355721.
[ "1", "2", "18", "218", "3194", "53890", "1019250", "21256090", "483426010", "11895873410", "314834663250", "8918883839450", "269367643864250", "8643467766472450", "293770652998691250", "10546424484691428250", "398914704362503668250", "15860639479547463637250", "661439858772303085871250", "28874834455755565593004250" ]
[ "nonn", "easy" ]
5
0
2
[ "A000698", "A001147", "A112934", "A355721", "A355722", "A355723", "A355724", "A355725" ]
null
Peter Bala, Jul 15 2022
2022-07-18T19:47:48
oeisdata/seq/A355/A355723.seq
1d7287672842974b1cdcc0eafc1b2a30
A355724
Row 4 of table A355721.
[ "1", "2", "22", "314", "5326", "102722", "2197558", "51355514", "1297759918", "35208930050", "1020115715542", "31432396066106", "1026506419425550", "35428218801977666", "1288967076156307702", "49323199246104202874", "1980947315202528449518", "83342865788161594337282", "3666525676611059535630742" ]
[ "nonn", "easy" ]
4
0
2
[ "A000698", "A001147", "A112934", "A355721", "A355722", "A355723", "A355724", "A355725" ]
null
Peter Bala, Jul 15 2022
2022-07-18T19:47:58
oeisdata/seq/A355/A355724.seq
706884550891d02cabe6ea81e4533c77
A355725
Row 5 of table A355721.
[ "1", "2", "26", "426", "8178", "176802", "4206618", "108577674", "3011332338", "89141101506", "2802596567706", "93232011912426", "3271729161905010", "120810104634555234", "4683805718871051162", "190294015841923438026", "8087576641287426829170", "358981130096398432055682", "16615841072836741527510810" ]
[ "nonn", "easy" ]
4
0
2
[ "A000698", "A001147", "A112934", "A355721", "A355722", "A355723", "A355724", "A355725" ]
null
Peter Bala, Jul 15 2022
2022-07-18T19:48:08
oeisdata/seq/A355/A355725.seq
67cdeda31e2a4454abf93ec5245673d4
A355726
a(n) = a(n-2) + prime(n-1) for a(0) = a(1) = 0.
[ "0", "0", "2", "3", "7", "10", "18", "23", "35", "42", "58", "71", "89", "108", "130", "151", "177", "204", "236", "265", "303", "336", "376", "415", "459", "504", "556", "605", "659", "712", "768", "825", "895", "956", "1032", "1095", "1181", "1246", "1338", "1409", "1505", "1582", "1684", "1763", "1875", "1956", "2072", "2155", "2283", "2378", "2510" ]
[ "nonn" ]
27
0
3
[ "A008347", "A077126", "A077131", "A330547", "A355726" ]
null
Paul Curtz, Jul 15 2022
2023-12-04T09:55:26
oeisdata/seq/A355/A355726.seq
5af3ebc4bbe5a74d00966f8cc9753b0a
A355727
First of four consecutive primes p, q, r, s where q*s == p (mod r).
[ "47", "139", "167", "257", "421", "557", "587", "647", "1021", "1051", "1217", "1601", "1759", "2957", "3803", "3911", "4007", "4397", "4423", "4463", "5351", "5471", "6257", "6691", "6857", "6949", "7577", "8081", "9109", "9697", "10223", "10847", "11927", "12101", "12601", "12911", "13669", "13711", "13751", "14537", "14621", "16217", "16607", "16903", "17021", "17359", "17477", "17911" ]
[ "nonn" ]
15
1
1
[ "A001223", "A355727" ]
null
J. M. Bergot and Robert Israel, Jul 15 2022
2024-07-07T19:17:35
oeisdata/seq/A355/A355727.seq
bf90dac99eff511f78dddfa2afaec9e8
A355728
Indices k of partition function where consecutive p(k) and p(k+1) are prime.
[ "2", "3", "4", "5", "1085" ]
[ "nonn", "hard", "more" ]
14
1
1
[ "A000041", "A046063", "A072213", "A284594", "A285086", "A285087", "A285088", "A355704", "A355705", "A355706", "A355728" ]
null
Serge Batalov, Jul 15 2022
2022-07-26T01:34:46
oeisdata/seq/A355/A355728.seq
e4887cff7426b4d4189f2b8533a17562
A355729
Tournament standing, under standard rules double elimination, of the participant whose elimination leaves n participants still in the tournament.
[ "1", "2", "3", "4", "5", "5", "7", "7", "9", "9", "9", "9", "13", "13", "13", "13", "17", "17", "17", "17", "17", "17", "17", "17", "25", "25", "25", "25", "25", "25", "25", "25", "33", "33", "33", "33", "33", "33", "33", "33", "33", "33", "33", "33", "33", "33", "33", "33", "49", "49", "49", "49", "49", "49", "49", "49", "49", "49", "49", "49", "49", "49", "49", "49", "65", "65", "65" ]
[ "easy", "nonn" ]
49
0
2
null
null
Andrew Mirror, Jul 15 2022
2022-09-06T10:31:21
oeisdata/seq/A355/A355729.seq
57ca2e8ca00f7c9353e7f3ece4482692
A355730
Number of binary relations R on [n] such that R is contained in R^2.
[ "1", "2", "13", "333", "34924", "15339497", "28399641433" ]
[ "nonn", "more" ]
37
0
2
[ "A006905", "A070322", "A121337", "A355730" ]
null
Geoffrey Critzer, Jul 15 2022
2023-10-16T23:38:17
oeisdata/seq/A355/A355730.seq
a60fe3e43843f4ad6674695717aaabd8
A355731
Number of ways to choose a sequence of divisors, one of each element of the multiset of prime indices of n (row n of A112798).
[ "1", "1", "2", "1", "2", "2", "3", "1", "4", "2", "2", "2", "4", "3", "4", "1", "2", "4", "4", "2", "6", "2", "3", "2", "4", "4", "8", "3", "4", "4", "2", "1", "4", "2", "6", "4", "6", "4", "8", "2", "2", "6", "4", "2", "8", "3", "4", "2", "9", "4", "4", "4", "5", "8", "4", "3", "8", "4", "2", "4", "6", "2", "12", "1", "8", "4", "2", "2", "6", "6", "6", "4", "4", "6", "8", "4", "6", "8", "4", "2", "16", "2", "2", "6", "4", "4" ]
[ "nonn" ]
17
1
3
[ "A000005", "A000079", "A000720", "A001221", "A001222", "A001414", "A003586", "A003963", "A049820", "A056239", "A061395", "A076610", "A112798", "A120383", "A289509", "A316524", "A324850", "A326841", "A335433", "A335448", "A340606", "A340852", "A344616", "A345957", "A355731", "A355732", "A355733", "A355734", "A355735", "A355736", "A355737", "A355738", "A355739", "A355740", "A355741", "A355742", "A355744", "A355745", "A355746", "A355747", "A355748" ]
null
Gus Wiseman, Jul 16 2022
2022-07-24T14:13:46
oeisdata/seq/A355/A355731.seq
cbfe252f0923f82aad92d4efcdc29510
A355732
Least k such that there are exactly n ways to choose a sequence of divisors, one of each element of the multiset of prime indices of k (with multiplicity).
[ "1", "3", "7", "9", "53", "21", "311", "27", "49", "159", "8161", "63", "38873", "933", "371", "81", "147", "477", "2177", "24483", "189", "2809", "343", "2799", "1113", "243", "57127", "16483", "441", "1431", "6531", "73449", "2597", "567", "96721", "8427", "1029", "8397", "3339", "15239", "729", "49449", "1323", "19663", "4293", "2401", "19593", "7791" ]
[ "nonn" ]
7
1
2
[ "A000005", "A000720", "A001221", "A001222", "A001414", "A003963", "A056239", "A076610", "A112798", "A120383", "A324850", "A340606", "A355731", "A355732", "A355733", "A355734", "A355735", "A355736", "A355737", "A355738", "A355739", "A355740", "A355741", "A355742", "A355744", "A355746", "A355747", "A355748" ]
null
Gus Wiseman, Jul 21 2022
2022-07-22T17:45:12
oeisdata/seq/A355/A355732.seq
e59556af76a7b6b0aa7edbf6cb1836b4
A355733
Number of multisets that can be obtained by choosing a divisor of each prime index of n.
[ "1", "1", "2", "1", "2", "2", "3", "1", "3", "2", "2", "2", "4", "3", "4", "1", "2", "3", "4", "2", "5", "2", "3", "2", "3", "4", "4", "3", "4", "4", "2", "1", "4", "2", "6", "3", "6", "4", "7", "2", "2", "5", "4", "2", "6", "3", "4", "2", "6", "3", "4", "4", "5", "4", "4", "3", "7", "4", "2", "4", "6", "2", "7", "1", "7", "4", "2", "2", "6", "6", "6", "3", "4", "6", "6", "4", "6", "7", "4", "2", "5", "2", "2", "5", "4", "4", "7" ]
[ "nonn" ]
16
1
3
[ "A000005", "A000720", "A001221", "A001222", "A001414", "A003963", "A056239", "A061395", "A076610", "A112798", "A120383", "A289509", "A316524", "A324850", "A335433", "A335448", "A340606", "A340852", "A344616", "A355731", "A355732", "A355733", "A355734", "A355735", "A355736", "A355737", "A355739", "A355740", "A355741", "A355744", "A355746", "A355747" ]
null
Gus Wiseman, Jul 16 2022
2025-04-01T10:27:03
oeisdata/seq/A355/A355733.seq
19b9532cac66a26065f1bb0c46c8a228
A355734
Least k such that there are exactly n multisets that can be obtained by choosing a divisor of each prime index of k.
[ "1", "3", "7", "13", "21", "35", "39", "89", "133", "105", "91", "195", "351", "285", "247", "333", "273", "481", "455", "555", "623", "801", "791", "741", "1359", "1157", "1281", "1335", "1365", "1443", "1977", "1729", "1967", "1869", "2109", "3185", "2373", "2769", "2639", "4361", "3367", "3653", "3885", "3471", "4613", "5883", "5187", "5551", "6327" ]
[ "nonn" ]
7
1
2
[ "A000005", "A000720", "A001221", "A001222", "A001414", "A003963", "A056239", "A076610", "A112798", "A120383", "A324850", "A340852", "A344606", "A355731", "A355732", "A355733", "A355734", "A355735", "A355736", "A355737", "A355739", "A355740", "A355741", "A355744", "A355747" ]
null
Gus Wiseman, Jul 21 2022
2022-07-22T20:52:04
oeisdata/seq/A355/A355734.seq
e2b506f7a33569eee17d7130dd988b6d
A355735
Number of ways to choose a divisor of each prime index of n (taken in weakly increasing order) such that the result is weakly increasing.
[ "1", "1", "2", "1", "2", "2", "3", "1", "3", "2", "2", "2", "4", "3", "3", "1", "2", "3", "4", "2", "5", "2", "3", "2", "3", "4", "4", "3", "4", "3", "2", "1", "3", "2", "4", "3", "6", "4", "7", "2", "2", "5", "4", "2", "4", "3", "4", "2", "6", "3", "3", "4", "5", "4", "3", "3", "7", "4", "2", "3", "6", "2", "7", "1", "6", "3", "2", "2", "5", "4", "6", "3", "4", "6", "4", "4", "4", "7", "4", "2", "5", "2", "2", "5", "3", "4", "7" ]
[ "nonn" ]
11
1
3
[ "A000005", "A000720", "A001221", "A001222", "A001414", "A003963", "A056239", "A061395", "A076610", "A112798", "A120383", "A316524", "A324850", "A335433", "A335448", "A340827", "A340852", "A344616", "A355731", "A355732", "A355733", "A355734", "A355735", "A355736", "A355737", "A355739", "A355740", "A355741", "A355742", "A355744", "A355745", "A355749" ]
null
Gus Wiseman, Jul 16 2022
2022-07-24T14:13:54
oeisdata/seq/A355/A355735.seq
ebdf7146d3ec05ac7515de04eb73049e
A355736
Least k such that there are exactly n ways to choose a divisor of each prime index of k (taken in weakly increasing order) such that the result is also weakly increasing.
[ "1", "3", "7", "13", "21", "37", "39", "89", "133", "117", "111", "273", "351", "259", "267", "333", "453", "793", "669", "623", "999", "777", "843", "1491", "1157", "1561", "2863", "1443", "1963", "2331", "1977", "1869", "2899", "2529", "3207", "4107", "3171", "5073", "4329", "3653", "4667", "3471", "7399", "4613", "7587", "5931", "7269", "5889", "7483" ]
[ "nonn" ]
7
1
2
[ "A000005", "A000720", "A001221", "A001222", "A001414", "A003963", "A056239", "A076610", "A112798", "A120383", "A324850", "A355731", "A355732", "A355733", "A355734", "A355735", "A355736", "A355737", "A355739", "A355740", "A355741", "A355744", "A355745", "A355749" ]
null
Gus Wiseman, Jul 21 2022
2022-07-22T20:51:59
oeisdata/seq/A355/A355736.seq
4f9f7f51c6a057e4a809fd02a6465dde
A355737
Number of ways to choose a sequence of divisors, one of each prime index of n (with multiplicity), such that the result has no common divisor > 1.
[ "0", "1", "1", "1", "1", "2", "1", "1", "3", "2", "1", "2", "1", "3", "4", "1", "1", "4", "1", "2", "4", "2", "1", "2", "3", "4", "7", "3", "1", "4", "1", "1", "4", "2", "6", "4", "1", "4", "6", "2", "1", "6", "1", "2", "8", "3", "1", "2", "5", "4", "4", "4", "1", "8", "4", "3", "5", "4", "1", "4", "1", "2", "10", "1", "6", "4", "1", "2", "6", "6", "1", "4", "1", "6", "8", "4", "6", "8", "1", "2", "15", "2", "1", "6", "4", "4" ]
[ "nonn" ]
11
1
6
[ "A000005", "A000720", "A001221", "A001222", "A001414", "A003963", "A007359", "A051424", "A056239", "A076610", "A112798", "A120383", "A289507", "A289508", "A289509", "A296150", "A302696", "A302697", "A302698", "A302796", "A324850", "A355731", "A355732", "A355733", "A355735", "A355737", "A355738", "A355739", "A355740", "A355741", "A355742", "A355744", "A355745", "A355748" ]
null
Gus Wiseman, Jul 17 2022
2022-07-18T22:49:49
oeisdata/seq/A355/A355737.seq
c74b5c66714eb2725c246e27063917c4
A355738
Least k such that there are exactly n ways to choose a sequence of divisors, one of each prime index of k (with multiplicity), such that the result has no common divisor > 1.
[ "1", "2", "6", "9", "15", "49", "35", "27", "45", "98", "63", "105", "171", "117", "81", "135", "245", "343", "273", "549", "189", "1083", "315", "5618", "741", "686", "507", "513", "351", "243", "405", "7467", "6419", "5575", "735", "6859", "1813", "3231", "1183", "1197", "3537", "819", "1647", "567", "945", "2197", "8397", "3211", "1715", "3249", "3367" ]
[ "nonn" ]
7
1
2
[ "A000005", "A000720", "A001221", "A001222", "A001414", "A003963", "A007359", "A051424", "A056239", "A076610", "A112798", "A120383", "A289508", "A289509", "A302696", "A302697", "A302698", "A302796", "A324850", "A355731", "A355732", "A355733", "A355735", "A355737", "A355738", "A355739", "A355741", "A355748" ]
null
Gus Wiseman, Jul 21 2022
2022-07-22T20:51:54
oeisdata/seq/A355/A355738.seq
65473a4e1423184f5b9a0c676e2ce748
A355739
Number of ways to choose a sequence of all different divisors, one of each prime index of n (with multiplicity).
[ "1", "1", "2", "0", "2", "1", "3", "0", "2", "1", "2", "0", "4", "2", "3", "0", "2", "0", "4", "0", "4", "1", "3", "0", "2", "3", "0", "0", "4", "1", "2", "0", "3", "1", "5", "0", "6", "3", "6", "0", "2", "1", "4", "0", "2", "2", "4", "0", "6", "0", "3", "0", "5", "0", "3", "0", "6", "3", "2", "0", "6", "1", "2", "0", "6", "1", "2", "0", "5", "2", "6", "0", "4", "5", "2", "0", "5", "2", "4", "0", "0", "1", "2", "0", "3", "3", "6" ]
[ "nonn" ]
7
1
3
[ "A000005", "A000720", "A001221", "A001222", "A001414", "A003963", "A056239", "A076610", "A112798", "A120383", "A289508", "A289509", "A302796", "A355535", "A355537", "A355731", "A355732", "A355733", "A355735", "A355737", "A355738", "A355739", "A355740", "A355741", "A355742", "A355744", "A355748" ]
null
Gus Wiseman, Jul 18 2022
2022-07-19T08:04:21
oeisdata/seq/A355/A355739.seq
e0e44421ea40ddd08af60708ab4c2a26
A355740
Numbers of which it is not possible to choose a different divisor of each prime index.
[ "4", "8", "12", "16", "18", "20", "24", "27", "28", "32", "36", "40", "44", "48", "50", "52", "54", "56", "60", "64", "68", "72", "76", "80", "81", "84", "88", "90", "92", "96", "100", "104", "108", "112", "116", "120", "124", "125", "126", "128", "132", "135", "136", "140", "144", "148", "150", "152", "156", "160", "162", "164", "168", "172", "176", "180", "184", "188" ]
[ "nonn" ]
15
1
1
[ "A000005", "A000720", "A001221", "A001222", "A001414", "A003963", "A056239", "A076610", "A112798", "A120383", "A324850", "A335433", "A335448", "A340827", "A355529", "A355535", "A355731", "A355732", "A355733", "A355734", "A355737", "A355739", "A355740", "A355741", "A355744", "A355745", "A355749", "A370348" ]
null
Gus Wiseman, Jul 22 2022
2024-02-16T09:56:59
oeisdata/seq/A355/A355740.seq
219e437a5cbdb2aa438af94598a7f0de
A355741
Number of ways to choose a sequence of prime factors, one of each prime index of n.
[ "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "2", "0", "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "2", "0", "1", "0", "1", "0", "1", "0", "2", "0", "2", "0", "1", "0", "2", "0", "1", "0", "2", "0", "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "2", "0", "1", "0", "2", "0", "1", "0", "1", "0", "2", "0", "2", "0", "1", "0", "1", "0", "2", "0", "1", "0", "1", "0", "1", "0", "2" ]
[ "nonn", "mult" ]
8
1
13
[ "A000720", "A001221", "A001222", "A001414", "A003963", "A056239", "A061395", "A076610", "A112798", "A120383", "A289509", "A299174", "A324850", "A335433", "A355731", "A355732", "A355733", "A355735", "A355737", "A355739", "A355741", "A355742", "A355743", "A355744", "A355745", "A355746", "A355747" ]
null
Gus Wiseman, Jul 18 2022
2022-07-19T08:04:16
oeisdata/seq/A355/A355741.seq
4ebeafd1d68b5cb9733ace7647aa8d69
A355742
Number of ways to choose a sequence of prime-power divisors, one of each prime index of n. Product of bigomega over the prime indices of n, with multiplicity.
[ "1", "0", "1", "0", "1", "0", "2", "0", "1", "0", "1", "0", "2", "0", "1", "0", "1", "0", "3", "0", "2", "0", "2", "0", "1", "0", "1", "0", "2", "0", "1", "0", "1", "0", "2", "0", "3", "0", "2", "0", "1", "0", "2", "0", "1", "0", "2", "0", "4", "0", "1", "0", "4", "0", "1", "0", "3", "0", "1", "0", "3", "0", "2", "0", "2", "0", "1", "0", "2", "0", "3", "0", "2", "0", "1", "0", "2", "0", "2", "0", "1", "0", "1", "0", "1", "0", "2" ]
[ "nonn", "mult" ]
8
1
7
[ "A000688", "A000720", "A001221", "A001222", "A001414", "A001970", "A003963", "A056239", "A061260", "A076610", "A112798", "A120383", "A279784", "A289509", "A299174", "A324850", "A355731", "A355732", "A355733", "A355735", "A355739", "A355741", "A355742", "A355743", "A355744", "A355745", "A355746" ]
null
Gus Wiseman, Jul 20 2022
2022-07-21T07:40:40
oeisdata/seq/A355/A355742.seq
885e93da7751286335ae98a097a80aa4
A355743
Numbers whose prime indices are all prime-powers.
[ "1", "3", "5", "7", "9", "11", "15", "17", "19", "21", "23", "25", "27", "31", "33", "35", "41", "45", "49", "51", "53", "55", "57", "59", "63", "67", "69", "75", "77", "81", "83", "85", "93", "95", "97", "99", "103", "105", "109", "115", "119", "121", "123", "125", "127", "131", "133", "135", "147", "153", "155", "157", "159", "161", "165", "171", "175", "177", "179", "187" ]
[ "nonn" ]
13
1
2
[ "A000688", "A000961", "A001222", "A023893", "A023894", "A034699", "A050361", "A054685", "A076610", "A085970", "A106244", "A164336", "A246655", "A279784", "A295935", "A302492", "A302493", "A302590", "A302601", "A354911", "A355731", "A355741", "A355742", "A355743", "A356064", "A356065", "A356066" ]
null
Gus Wiseman, Jul 24 2022
2025-04-02T09:51:14
oeisdata/seq/A355/A355743.seq
2a061ba956b4fa0a326ac97e720be3ef
A355744
Number of multisets that can be obtained by choosing a prime factor of each prime index of n.
[ "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "2", "0", "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "2", "0", "1", "0", "1", "0", "1", "0", "2", "0", "2", "0", "1", "0", "2", "0", "1", "0", "2", "0", "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "2", "0", "1", "0", "2", "0", "1", "0", "1", "0", "2", "0", "2", "0", "1", "0", "1", "0", "2", "0", "1", "0", "1", "0", "1", "0", "2" ]
[ "nonn" ]
6
1
13
[ "A000720", "A001221", "A001222", "A001414", "A003963", "A056239", "A076610", "A112798", "A120383", "A289509", "A324850", "A335433", "A340852", "A344606", "A355731", "A355733", "A355734", "A355735", "A355737", "A355739", "A355740", "A355741", "A355744", "A355745" ]
null
Gus Wiseman, Jul 18 2022
2022-07-19T08:04:12
oeisdata/seq/A355/A355744.seq
78dd7590805dd3d7e0edfd0661e2c3a5
A355745
Number of ways to choose a prime factor of each prime index of n (with multiplicity, in weakly increasing order) such that the result is also weakly increasing.
[ "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "2", "0", "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "2", "0", "1", "0", "1", "0", "0", "0", "2", "0", "2", "0", "1", "0", "2", "0", "1", "0", "2", "0", "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "1", "0", "2", "0", "1", "0", "1", "0", "1", "0", "1", "0", "2", "0", "2", "0", "1", "0", "1", "0", "2", "0", "1", "0", "1", "0", "1", "0", "2" ]
[ "nonn" ]
6
1
13
[ "A000005", "A000720", "A001221", "A001222", "A001414", "A003963", "A056239", "A076610", "A112798", "A120383", "A324850", "A335433", "A340852", "A355731", "A355732", "A355733", "A355734", "A355735", "A355736", "A355737", "A355739", "A355740", "A355741", "A355742", "A355744", "A355745", "A355749" ]
null
Gus Wiseman, Jul 18 2022
2022-07-19T08:04:07
oeisdata/seq/A355/A355745.seq
23907e62369aa29cfa71e175a4e4d674
A355746
Number of different multisets that can be obtained by choosing a prime index (or a prime factor) of each integer from 2 to n.
[ "1", "1", "1", "1", "1", "2", "2", "2", "2", "4", "4", "6", "6", "12", "20", "20", "20", "26", "26", "36", "58", "116", "116", "140", "140", "280", "280", "384", "384", "536", "536", "536", "844", "1688", "2380", "2716", "2716", "5432", "8484", "10152", "10152", "13308", "13308", "18064", "21616", "43232", "43232", "47648", "47648", "54656", "84480", "114304", "114304" ]
[ "nonn" ]
16
1
6
[ "A000040", "A000096", "A000142", "A000720", "A001221", "A001222", "A001414", "A002110", "A003963", "A056239", "A070826", "A076610", "A112798", "A131818", "A327486", "A355537", "A355538", "A355731", "A355733", "A355740", "A355741", "A355742", "A355744", "A355745", "A355746", "A355747" ]
null
Gus Wiseman, Jul 20 2022
2022-08-03T12:40:02
oeisdata/seq/A355/A355746.seq
e3872a534aa2fc48337f4d125448de0e
A355747
Number of multisets that can be obtained by choosing a divisor of each positive integer from 1 to n.
[ "1", "1", "2", "4", "10", "20", "58", "116", "320", "772", "2170", "4340", "14112", "28224", "78120", "212004", "612232", "1224464", "3873760", "7747520", "24224608", "64595088", "175452168", "350904336" ]
[ "nonn", "more" ]
21
0
3
[ "A000005", "A000040", "A000096", "A000142", "A000720", "A001221", "A001222", "A001414", "A002110", "A006218", "A066843", "A070826", "A076610", "A131818", "A327486", "A355537", "A355538", "A355731", "A355733", "A355737", "A355741", "A355744", "A355745", "A355746", "A355747" ]
null
Gus Wiseman, Jul 20 2022
2022-08-08T14:21:11
oeisdata/seq/A355/A355747.seq
d5ce769ec9d162c415001fb344eaa1df
A355748
Number of ways to choose a sequence of divisors, one of each part of the n-th composition in standard order.
[ "1", "1", "2", "1", "2", "2", "2", "1", "3", "2", "4", "2", "2", "2", "2", "1", "2", "3", "4", "2", "4", "4", "4", "2", "3", "2", "4", "2", "2", "2", "2", "1", "4", "2", "6", "3", "4", "4", "4", "2", "6", "4", "8", "4", "4", "4", "4", "2", "2", "3", "4", "2", "4", "4", "4", "2", "3", "2", "4", "2", "2", "2", "2", "1", "2", "4", "4", "2", "6", "6", "6", "3", "6", "4", "8", "4", "4", "4", "4", "2", "4", "6", "8", "4", "8", "8", "8" ]
[ "nonn" ]
9
0
3
[ "A000005", "A000079", "A000120", "A003963", "A005811", "A029837", "A066099", "A124767", "A175413", "A238279", "A274174", "A326841", "A333381", "A333755", "A353847", "A353848", "A353849", "A353850", "A353851", "A353852", "A354578", "A354904", "A354905", "A355731", "A355732", "A355733", "A355735", "A355737", "A355739", "A355747", "A355748" ]
null
Gus Wiseman, Jul 23 2022
2022-07-23T23:07:40
oeisdata/seq/A355/A355748.seq
bc1c4102ec81ab5e55906ccd99e4e623
A355749
Number of ways to choose a weakly decreasing sequence of divisors, one of each prime index of n (with multiplicity, taken in weakly increasing order).
[ "1", "1", "2", "1", "2", "1", "3", "1", "3", "1", "2", "1", "4", "1", "2", "1", "2", "1", "4", "1", "3", "1", "3", "1", "3", "1", "4", "1", "4", "1", "2", "1", "2", "1", "3", "1", "6", "1", "3", "1", "2", "1", "4", "1", "3", "1", "4", "1", "6", "1", "2", "1", "5", "1", "2", "1", "3", "1", "2", "1", "6", "1", "4", "1", "4", "1", "2", "1", "2", "1", "6", "1", "4", "1", "2", "1", "3", "1", "4", "1", "5", "1", "2", "1", "2", "1", "3" ]
[ "nonn" ]
5
1
3
[ "A000005", "A000720", "A001221", "A001222", "A001414", "A003963", "A056239", "A061395", "A076610", "A112798", "A120383", "A316524", "A324850", "A355731", "A355732", "A355733", "A355734", "A355735", "A355736", "A355737", "A355739", "A355740", "A355741", "A355742", "A355744", "A355745", "A355749" ]
null
Gus Wiseman, Jul 18 2022
2022-07-19T08:03:43
oeisdata/seq/A355/A355749.seq
df909fef35520cf5fa258f261ff0e78e
A355750
Sum of the divisors of 2n minus the number of divisors of 2n.
[ "1", "4", "8", "11", "14", "22", "20", "26", "33", "36", "32", "52", "38", "50", "64", "57", "50", "82", "56", "82", "88", "78", "68", "114", "87", "92", "112", "112", "86", "156", "92", "120", "136", "120", "136", "183", "110", "134", "160", "176", "122", "212", "128", "172", "222", "162", "140", "240", "165", "208", "208", "202", "158", "268", "208", "238", "232", "204", "176", "344", "182" ]
[ "nonn", "easy" ]
10
1
2
[ "A000005", "A000203", "A062731", "A065608", "A099777", "A355750" ]
null
Wesley Ivan Hurt, Jul 15 2022
2022-07-18T19:41:40
oeisdata/seq/A355/A355750.seq
e5e2add8f4b6d867d2d4aa1f003478b5
A355751
Positive numbers k such that the centered cube number k^3 + (k+1)^3 is equal to the difference of two positive cubes and to A352759(n).
[ "4", "121", "562", "1543", "3280", "5989", "9886", "15187", "22108", "30865", "41674", "54751", "70312", "88573", "109750", "134059", "161716", "192937", "227938", "266935", "310144", "357781", "410062", "467203", "529420", "596929", "669946", "748687", "833368", "924205", "1021414", "1125211", "1235812", "1353433" ]
[ "nonn", "easy" ]
21
1
1
[ "A001235", "A005898", "A272885", "A352133", "A352134", "A352135", "A352136", "A352220", "A352222", "A352223", "A352224", "A352225", "A352755", "A352756", "A352757", "A352758", "A352759", "A355751", "A355752", "A355753" ]
null
Vladimir Pletser, Jul 15 2022
2025-02-16T08:34:03
oeisdata/seq/A355/A355751.seq
9f2860cc54ee3dd31fe7741d7ca64015
A355752
a(n) = 3*(2*n - 1)*( 3*(2*n - 1)^3 + 1) / 2.
[ "6", "369", "2820", "10815", "29538", "65901", "128544", "227835", "375870", "586473", "875196", "1259319", "1757850", "2391525", "3182808", "4155891", "5336694", "6752865", "8433780", "10410543", "12715986", "15384669", "18452880", "21958635", "25941678", "30443481", "35507244", "41177895", "47502090", "54528213", "62306376", "70888419", "80327910", "90680145", "102002148", "114352671", "127792194" ]
[ "nonn", "easy" ]
17
1
1
[ "A001235", "A005898", "A272885", "A352133", "A352134", "A352135", "A352136", "A352220", "A352221", "A352223", "A352224", "A352225", "A352755", "A352756", "A352757", "A352758", "A352759", "A355751", "A355752", "A355753" ]
null
Vladimir Pletser, Jul 15 2022
2025-02-16T08:34:03
oeisdata/seq/A355/A355752.seq
04a85ac8623b1ec03b5c963a137a49cb
A355753
a(n) = 3*(2*n - 1)*( 3*(2*n - 1)^3 - 1) / 2 for n > 0.
[ "3", "360", "2805", "10794", "29511", "65868", "128505", "227790", "375819", "586416", "875133", "1259250", "1757775", "2391444", "3182721", "4155798", "5336595", "6752760", "8433669", "10410426", "12715863", "15384540", "18452745", "21958494", "25941531", "30443328", "35507085", "41177730", "47501919", "54528036", "62306193", "70888230", "80327715", "90679944", "102001941", "114352458", "127791975" ]
[ "nonn", "easy" ]
11
1
1
[ "A001235", "A005898", "A272885", "A352133", "A352134", "A352135", "A352136", "A352220", "A352221", "A352222", "A352224", "A352225", "A352755", "A352756", "A352757", "A352759", "A355751", "A355752", "A355753" ]
null
Vladimir Pletser, Jul 15 2022
2025-02-16T08:34:03
oeisdata/seq/A355/A355753.seq
d4701a21a371a53a9eed53934600b138
A355754
Irregular triangle read by rows: T(n,k) is the number of unlabeled n-node graphs with intersection number (or edge clique cover number) k; n >= 1, 0 <= k <= floor(n^2/4).
[ "1", "1", "1", "1", "2", "1", "1", "3", "4", "2", "1", "1", "4", "9", "10", "7", "2", "1", "1", "5", "17", "36", "46", "30", "14", "4", "2", "1", "1", "6", "28", "97", "219", "281", "226", "116", "45", "18", "5", "1", "1", "1", "7", "43", "226", "872", "2104", "3170", "2927", "1774", "793", "290", "87", "37", "9", "3", "2", "1", "1", "8", "62", "472", "2966", "12882", "36595", "63842", "69294", "48881", "24939", "9808", "3387", "1059", "313", "107", "37", "9", "4", "1", "1" ]
[ "nonn", "tabf" ]
23
1
5
[ "A000088", "A005744", "A355754", "A355755" ]
null
Pontus von Brömssen, Jul 16 2022
2025-04-02T10:26:26
oeisdata/seq/A355/A355754.seq
25910baca2e078219f860134bc192ced
A355755
Irregular triangle read by rows: T(n,k) is the number of unlabeled connected n-node graphs with intersection number (or edge clique cover number) k; n >= 1, 0 <= k <= floor(n^2/4).
[ "1", "0", "1", "0", "1", "1", "0", "1", "2", "2", "1", "0", "1", "4", "7", "6", "2", "1", "0", "1", "6", "22", "36", "27", "13", "4", "2", "1", "0", "1", "9", "53", "161", "242", "209", "111", "43", "17", "5", "1", "1", "0", "1", "12", "114", "611", "1766", "2903", "2793", "1723", "773", "284", "86", "36", "9", "3", "2", "1", "0", "1", "16", "221", "1987", "10517", "33078", "60639", "67379", "48035", "24628", "9715", "3349", "1049", "310", "105", "36", "9", "4", "1", "1" ]
[ "nonn", "tabf" ]
19
1
9
[ "A001349", "A002620", "A355754", "A355755" ]
null
Pontus von Brömssen, Jul 16 2022
2024-04-26T07:58:17
oeisdata/seq/A355/A355755.seq
0ac4649e51cfd066150d1ad780fff1dc
A355756
Triangle read by rows: A(n,k) is the intersection number of the Turán graph T(n,k), 1 <= k <= n.
[ "0", "0", "1", "0", "2", "1", "0", "4", "2", "1", "0", "6", "4", "2", "1", "0", "9", "4", "4", "2", "1", "0", "12", "6", "4", "4", "2", "1", "0", "16", "9", "5", "4", "4", "2", "1", "0", "20", "9", "6", "5", "4", "4", "2", "1", "0", "25", "12", "9", "6", "5", "4", "4", "2", "1", "0", "30", "16", "9", "6", "6", "5", "4", "4", "2", "1" ]
[ "nonn", "tabl", "more" ]
8
1
5
[ "A002620", "A008133", "A355754", "A355756" ]
null
Pontus von Brömssen, Jul 16 2022
2022-07-18T19:29:58
oeisdata/seq/A355/A355756.seq
8a2db15a80c430c8ff1ac02b080d0384
A355757
Smallest n-layered number.
[ "1", "6", "120", "27720", "147026880", "130429015516800", "1970992304700453905270400", "1897544233056092162003806758651798777216000" ]
[ "nonn", "hard", "more" ]
36
1
2
[ "A083207", "A204830", "A204831", "A355757" ]
null
Michel Marcus, Jul 20 2022
2022-07-20T11:15:42
oeisdata/seq/A355/A355757.seq
3429d5aa7031da343b35cabae7f7fac2
A355758
Irregular triangle read by rows in which row n lists the divisors of n that are Fibonacci numbers.
[ "1", "1", "2", "1", "3", "1", "2", "1", "5", "1", "2", "3", "1", "1", "2", "8", "1", "3", "1", "2", "5", "1", "1", "2", "3", "1", "13", "1", "2", "1", "3", "5", "1", "2", "8", "1", "1", "2", "3", "1", "1", "2", "5", "1", "3", "21", "1", "2", "1", "1", "2", "3", "8", "1", "5", "1", "2", "13", "1", "3", "1", "2", "1", "1", "2", "3", "5", "1", "1", "2", "8", "1", "3", "1", "2", "34", "1", "5", "1", "2", "3", "1", "1", "2", "1", "3", "13", "1", "2", "5", "8" ]
[ "nonn", "tabf" ]
10
1
3
[ "A000012", "A000045", "A005086", "A005092", "A010056", "A027750", "A054494", "A355758" ]
null
Michel Marcus, Jul 16 2022
2022-07-16T11:55:51
oeisdata/seq/A355/A355758.seq
b4bd5da8f5481e11efc88bf6dd32e713
A355759
Sums of the first ceiling((n+1)/2) entries on the diagonals of a square spiral with a starting value of 1 in the center, where the diagonal and the antidiagonal are used alternately.
[ "1", "4", "6", "11", "15", "24", "32", "45", "57", "76", "94", "119", "143", "176", "208", "249", "289", "340", "390", "451", "511", "584", "656", "741", "825", "924", "1022", "1135", "1247", "1376", "1504", "1649", "1793", "1956", "2118", "2299", "2479", "2680", "2880", "3101", "3321", "3564", "3806", "4071", "4335", "4624", "4912", "5225", "5537", "5876", "6214", "6579", "6943" ]
[ "nonn", "easy" ]
53
1
2
[ "A006527", "A106607", "A114254", "A200975", "A208995", "A355759" ]
null
Karl-Heinz Hofmann, Aug 14 2022
2022-11-21T10:01:07
oeisdata/seq/A355/A355759.seq
4cefe35e54dbda5931aed65e8e2bf687
A355760
a(n) is the number of grid points in a square lattice covered by the area enclosed by n loops of an Archimedean spiral with starting point (0, 0) and endpoint (n, 0).
[ "1", "2", "8", "21", "40", "64", "97", "132", "178", "228", "282", "350", "415", "492", "574", "660", "756", "855", "962", "1076", "1195", "1322", "1451", "1590", "1736", "1885", "2044", "2204", "2378", "2552", "2734", "2922", "3116", "3317", "3525", "3741", "3960", "4187", "4416", "4655", "4900", "5154", "5410", "5674", "5946", "6223", "6502", "6791", "7087", "7391", "7698" ]
[ "nonn" ]
40
0
2
[ "A000328", "A046109", "A295344", "A355760" ]
null
Karl-Heinz Hofmann, Jul 16 2022
2022-08-07T07:53:45
oeisdata/seq/A355/A355760.seq
31292f03dc9b5544759618ac3b1f4a56
A355761
a(n) is the number of grid points in a square lattice strictly outside of the area enclosed by n loops of an Archimedean spiral and inside (or on the boundary) of a circle with radius n.
[ "0", "3", "5", "8", "9", "17", "16", "17", "19", "25", "35", "27", "26", "37", "39", "49", "41", "46", "47", "53", "62", "51", "66", "63", "57", "76", "77", "85", "75", "77", "87", "79", "93", "92", "100", "112", "93", "106", "97", "122", "125", "107", "115", "115", "131", "138", "123", "130", "126", "134", "147", "164", "163", "149", "151", "148", "171", "159", "172", "160", "172", "180", "176" ]
[ "nonn" ]
13
0
2
[ "A000328", "A355760", "A355761" ]
null
Karl-Heinz Hofmann, Jul 29 2022
2022-09-01T18:56:30
oeisdata/seq/A355/A355761.seq
0bf243f65089f20e7485526d9104c749
A355762
E.g.f. satisfies log(A(x)) = (exp(x*A(x)) - 1) * A(x)^2.
[ "1", "1", "8", "125", "2987", "96727", "3963841", "196769897", "11480304448", "770031502467", "58386951857583", "4938864464154469", "461111056016847137", "47101341445053180079", "5225323162578044669492", "625646891309723527419137", "80416734865584980392853799", "11044230667889978466327860347" ]
[ "nonn" ]
11
0
3
[ "A030019", "A162656", "A349557", "A355762", "A355763", "A355766" ]
null
Seiichi Manyama, Jul 16 2022
2022-07-16T11:50:35
oeisdata/seq/A355/A355762.seq
629c1bebeb1911e78aedf8caf1139476
A355763
E.g.f. satisfies A(x)^2 * log(A(x)) = exp(x*A(x)) - 1.
[ "1", "1", "0", "5", "-13", "207", "-1791", "28849", "-438600", "8619291", "-181134313", "4381744589", "-115439041983", "3356162869607", "-105668550658100", "3600058076291465", "-131618721053773713", "5146452228945999699", "-214171122214841864975", "9454288479242533668837" ]
[ "sign" ]
14
0
4
[ "A030019", "A349588", "A349654", "A355762", "A355763" ]
null
Seiichi Manyama, Jul 16 2022
2022-07-16T11:49:42
oeisdata/seq/A355/A355763.seq
67e883dd7691fa68d144d44df3f37428
A355764
E.g.f. satisfies log(A(x)) = (1 - exp(-x*A(x))) * A(x)^2.
[ "1", "1", "6", "77", "1533", "41547", "1427789", "59501185", "2916185862", "164377512831", "10477134939301", "745130845917317", "58499605416732225", "5025399546258317683", "468897159717886522970", "47222645752129576973609", "5105611277081800029406545", "589843003782904742592169479" ]
[ "nonn" ]
10
0
3
[ "A334986", "A349558", "A355764" ]
null
Seiichi Manyama, Jul 16 2022
2022-07-16T11:49:56
oeisdata/seq/A355/A355764.seq
0bca54b322db9f89c586229f00d267bd
A355765
E.g.f. satisfies A(x)^2 * log(A(x)) = 1 - exp(-x*A(x)).
[ "1", "1", "-2", "5", "-27", "307", "-4403", "71353", "-1333090", "28816647", "-709090995", "19516306141", "-593330123807", "19747569261851", "-714304238263502", "27903505800651169", "-1170716239531658759", "52503701213718494671", "-2506483879112555156467", "126905975195788734150405" ]
[ "sign" ]
11
0
3
[ "A334986", "A349589", "A355765" ]
null
Seiichi Manyama, Jul 16 2022
2022-07-16T11:49:34
oeisdata/seq/A355/A355765.seq
fabfe8b37fe7d4fe0174511c37893a3a
A355766
E.g.f. satisfies A(x) = 1/(1 - x*A(x))^(A(x)^2).
[ "1", "1", "8", "126", "3028", "98540", "4056948", "202301456", "11855415920", "798682318848", "60823290655680", "5167260183157248", "484519323081722784", "49705696509114472320", "5537956421036240838336", "665926312161296782156800", "85960998514145805006711552" ]
[ "nonn" ]
14
0
3
[ "A001761", "A349556", "A355766" ]
null
Seiichi Manyama, Jul 16 2022
2022-07-21T03:51:23
oeisdata/seq/A355/A355766.seq
2e2e0b94ce865dbf35220c0f0f1a84d6
A355767
E.g.f. satisfies A(x)^(A(x)^2) = 1/(1 - x*A(x)).
[ "1", "1", "0", "6", "-4", "300", "-828", "42224", "-266992", "11916864", "-132472320", "5688511488", "-95465876064", "4138883728512", "-95019458907072", "4276023328128000", "-125481256750340352", "5958015717717504000", "-212934915549001078272", "10767675634298110255104" ]
[ "sign" ]
11
0
4
[ "A001761", "A141209", "A355767", "A355768" ]
null
Seiichi Manyama, Jul 16 2022
2022-07-16T11:50:15
oeisdata/seq/A355/A355767.seq
739f746f265448150c82df58a87a2dd3
A355768
E.g.f. satisfies A(x)^(A(x)^2) = 1 + x*A(x).
[ "1", "1", "-2", "6", "-28", "260", "-3948", "71120", "-1392368", "29971008", "-724981920", "19800726528", "-603571233120", "20210951379840", "-734663902256256", "28785160833254400", "-1210241780559067392", "54390280325210271744", "-2602745536670709682176", "132118736078618372579328" ]
[ "sign" ]
13
0
3
[ "A000142", "A162656", "A349587", "A349650", "A355767", "A355768" ]
null
Seiichi Manyama, Jul 16 2022
2022-07-16T11:50:26
oeisdata/seq/A355/A355768.seq
9ae4ff0b39ddea6c6409df27b76029d1
A355769
Numbers k such that both k and k+1 can be written as the sum of two nonzero squares.
[ "17", "25", "40", "52", "72", "73", "89", "97", "100", "116", "136", "145", "148", "169", "180", "193", "225", "232", "233", "241", "244", "260", "288", "289", "292", "305", "313", "337", "369", "388", "400", "404", "409", "424", "449", "457", "481", "520", "521", "544", "548", "577", "584", "585", "592", "612", "625", "628", "640", "656", "673", "676", "697", "724" ]
[ "nonn" ]
20
1
1
[ "A000290", "A000404", "A000415", "A355769" ]
null
Angad Singh, Jul 16 2022
2022-09-09T04:04:48
oeisdata/seq/A355/A355769.seq
69ff4805b327d6c9b29f0603263adc95
A355770
a(n) is the number of terms of A333369 that divide n.
[ "1", "1", "2", "1", "2", "2", "2", "1", "3", "2", "1", "2", "2", "2", "4", "1", "2", "3", "2", "2", "3", "2", "1", "2", "2", "2", "3", "2", "1", "4", "2", "1", "2", "2", "4", "3", "2", "2", "4", "2", "1", "3", "1", "3", "5", "1", "1", "2", "2", "2", "4", "2", "2", "3", "2", "2", "4", "1", "2", "4", "1", "2", "4", "1", "3", "4", "1", "2", "2", "4", "2", "3", "2", "2", "5", "2", "2", "4", "2", "2", "3", "1", "1", "3", "3", "1", "2" ]
[ "nonn", "base" ]
20
1
3
[ "A083230", "A087990", "A087991", "A332268", "A333369", "A353735", "A355302", "A355770", "A355771", "A355772", "A355773" ]
null
Bernard Schott, Jul 16 2022
2022-07-30T12:36:49
oeisdata/seq/A355/A355770.seq
f78eac777404ea32dd9d50220685b259
A355771
a(n) is the smallest integer that has exactly n divisors from A333369.
[ "1", "3", "9", "15", "45", "105", "195", "315", "945", "900", "1575", "2100", "3900", "6825", "11655", "10500", "6300", "18900", "25200", "35100", "27300", "31500", "44100", "94500", "157500", "107100", "81900", "233100", "220500", "598500", "245700", "333900", "409500", "491400", "900900", "573300", "600600", "1228500", "1669500", "1965600" ]
[ "nonn", "base" ]
36
1
2
[ "A005231", "A053624", "A087997", "A333369", "A333456", "A353735", "A355303", "A355699", "A355770", "A355771", "A355772", "A355773" ]
null
Bernard Schott, Jul 17 2022
2022-07-30T12:53:26
oeisdata/seq/A355/A355771.seq
95f171f6e8a9441176331eb5853d1128
A355772
Positions of records in A355770.
[ "1", "3", "9", "15", "45", "105", "195", "315", "900", "1575", "2100", "3900", "6300", "18900", "25200", "27300", "31500", "44100", "81900", "220500", "245700", "333900", "409500", "491400", "573300", "600600", "1201200", "2402400", "3603600", "4804800", "7207200", "10810800", "14414400", "20420400", "21621600", "40840800", "43243200" ]
[ "nonn", "base" ]
25
1
2
[ "A093036", "A093037", "A333369", "A340549", "A350424", "A353735", "A355770", "A355771", "A355772", "A355773" ]
null
Bernard Schott, Jul 18 2022
2022-07-30T12:37:39
oeisdata/seq/A355/A355772.seq
bca6721d30a388b4747943cd9f5a385e
A355773
Numbers all of whose divisors are members of A333369.
[ "1", "3", "5", "7", "9", "13", "15", "17", "19", "31", "35", "37", "39", "51", "53", "57", "59", "71", "73", "79", "91", "93", "95", "97", "111", "137", "139", "153", "157", "159", "173", "179", "193", "197", "221", "223", "227", "229", "317", "333", "359", "371", "379", "395", "397", "443", "449", "519", "537", "571", "579", "591", "593", "661", "663", "669", "719", "739" ]
[ "nonn", "base" ]
39
1
2
[ "A062687", "A155045", "A190217", "A329419", "A333369", "A337741", "A353735", "A355770", "A355771", "A355772", "A355773", "A355853" ]
null
Bernard Schott, Jul 18 2022
2022-09-04T13:01:18
oeisdata/seq/A355/A355773.seq
9a61532b2463389c579d0e7b2f17041b
A355774
An extension of the generalized pentagonal numbers such that every positive integer can be represented as the sum of at most two terms of the sequence.
[ "0", "1", "2", "5", "7", "11", "12", "15", "21", "22", "25", "26", "35", "39", "40", "49", "51", "57", "67", "70", "77", "87", "92", "100", "117", "120", "123", "126", "145", "153", "155", "173", "176", "182", "186", "187", "205", "210", "214", "222", "228", "241", "247", "251", "260", "283", "287", "301", "319", "330", "345", "376", "382", "392", "425", "435", "442", "448" ]
[ "nonn" ]
21
0
3
[ "A000326", "A001318", "A093519", "A100878", "A176747", "A355717", "A355774" ]
null
Peter Luschny, Jul 17 2022
2024-03-07T08:02:31
oeisdata/seq/A355/A355774.seq
74eb8a8052a66805d6c21f2ec7b28122
A355775
Expansion of 1 + f/(1 + 2*f), where f is the g.f. of the swinging factorial (A056040).
[ "1", "1", "0", "2", "-10", "30", "-84", "244", "-722", "2126", "-6252", "18364", "-53988", "158668", "-466408", "1370792", "-4029154", "11842222", "-34806972", "102303468", "-300690348", "883782404", "-2597604952", "7634834648", "-22440207764", "65955900268", "-193856647736", "569780485080", "-1674690451976" ]
[ "sign" ]
13
0
4
[ "A056040", "A355488", "A355775" ]
null
Peter Luschny, Jul 22 2022
2025-04-17T07:04:02
oeisdata/seq/A355/A355775.seq
4ecf9de7295400fac7263000e515615c
A355776
Partition triangle read by rows. A statistic of permutations whose Lehmer code is nonmonotonic, refining triangle A356116.
[ "0", "0", "0", "0", "0", "1", "0", "0", "3", "2", "5", "0", "0", "6", "10", "22", "24", "16", "0", "0", "10", "20", "12", "61", "162", "29", "102", "150", "42", "0", "0", "15", "35", "49", "135", "432", "246", "273", "391", "1389", "461", "388", "698", "99", "0", "0", "21", "56", "90", "52", "260", "982", "1288", "740", "827", "1150", "4974", "2745", "5778", "482", "2057", "8924", "4148", "1333", "2764", "219", "0" ]
[ "nonn", "tabf" ]
19
0
9
[ "A000041", "A000217", "A002662", "A056986", "A355776", "A355777", "A356116" ]
null
Peter Luschny, Jul 27 2022
2022-08-23T06:16:08
oeisdata/seq/A355/A355776.seq
95f72ca3db334a6fd328ab6052a445fe
A355777
Partition triangle read by rows. A statistic of permutations given by their Lehmer code refining Euler's triangle A173018.
[ "1", "1", "1", "1", "1", "4", "1", "1", "7", "4", "11", "1", "1", "11", "15", "32", "34", "26", "1", "1", "16", "26", "15", "76", "192", "34", "122", "180", "57", "1", "1", "22", "42", "56", "156", "474", "267", "294", "426", "1494", "496", "423", "768", "120", "1", "1", "29", "64", "98", "56", "288", "1038", "1344", "768", "855", "1206", "5142", "2829", "5946", "496", "2127", "9204", "4288", "1389", "2904", "247", "1" ]
[ "nonn", "tabf" ]
30
0
6
[ "A000041", "A000124", "A000142", "A000295", "A123125", "A145271", "A173018", "A179454", "A355777" ]
null
Peter Luschny, Jul 16 2022
2023-03-18T08:49:14
oeisdata/seq/A355/A355777.seq
8307e4ded8216d81b5f003a8b46e0fd7
A355778
Numbers k such that both k and k^2 + 2 can be written as the sum of two nonzero squares.
[ "40", "68", "72", "104", "148", "180", "320", "392", "468", "544", "612", "648", "720", "788", "832", "900", "936", "968", "1040", "1044", "1156", "1192", "1256", "1300", "1332", "1508", "1732", "1796", "1800", "1832", "1872", "1940", "2056", "2196", "2308", "2336", "2372", "2448", "2664", "2696", "2740", "2804", "2848", "2880", "3060", "3200", "3280" ]
[ "nonn" ]
21
1
1
[ "A000290", "A000404", "A000415", "A355778" ]
null
Angad Singh, Jul 16 2022
2022-09-15T02:17:29
oeisdata/seq/A355/A355778.seq
2de9950b9875d1d61a6160b00c15a1fb
A355779
E.g.f. satisfies A(x) = 1/(1 - x)^(2 * A(x)).
[ "1", "2", "14", "168", "2912", "66600", "1900056", "65101120", "2606993728", "119561789952", "6181730106240", "355838533286016", "22573258090527360", "1564818434983235328", "117698836976753297664", "9547346757806586746880", "830846347686871026714624", "77215374643802544102187008" ]
[ "nonn" ]
18
0
2
[ "A052813", "A351275", "A355779", "A355786" ]
null
Seiichi Manyama, Jul 16 2022
2022-07-18T11:47:44
oeisdata/seq/A355/A355779.seq
29286eb84d1f16bbc98e215b2289f1dd
A355780
E.g.f. satisfies A(x) = (1 + x)^(2 * A(x)).
[ "1", "2", "10", "96", "1352", "25400", "597816", "16941568", "561993344", "21372060672", "916910785920", "43817650647936", "2308500130055808", "132941831957885184", "8308594453077321984", "560108109905112238080", "40514005700203717945344", "3129925644058623770173440" ]
[ "nonn" ]
16
0
2
[ "A033917", "A351274", "A355780", "A355787" ]
null
Seiichi Manyama, Jul 16 2022
2022-07-17T10:59:09
oeisdata/seq/A355/A355780.seq
278c87792203525e7a3ce6a484e55b2a
A355781
E.g.f. satisfies log(A(x)) = 2 * (exp(x) - 1) * A(x).
[ "1", "2", "14", "166", "2854", "64854", "1839622", "62688406", "2497159302", "113932356630", "5860555367814", "335639363668118", "21184456464757894", "1461163816568091926", "109351697864286862214", "8825909581376322510230", "764231343305480319046278", "70670539764733828998689302" ]
[ "nonn" ]
22
0
2
[ "A052880", "A351276", "A355781", "A355788" ]
null
Seiichi Manyama, Jul 16 2022
2022-11-16T08:53:16
oeisdata/seq/A355/A355781.seq
b54c444ee865d227ee18cfa22c9a1961
A355782
E.g.f. satisfies log(A(x)) = 2 * (1 - exp(-x)) * A(x).
[ "1", "2", "10", "94", "1314", "24494", "572418", "16109678", "530772610", "20049256686", "854425665410", "40560727143534", "2122785621956226", "121440903560075246", "7539867236251002242", "504946360197545803630", "36284349255747713008770", "2784785703026225861819118" ]
[ "nonn" ]
16
0
2
[ "A058864", "A351277", "A355782", "A355789" ]
null
Seiichi Manyama, Jul 16 2022
2022-07-18T12:01:22
oeisdata/seq/A355/A355782.seq
85f3017ce47c08925deb867ec06d04f5
A355783
Triangular array read by rows. T(n,k) is the number of labeled transitive relations on [n] that have exactly k symmetric points.
[ "1", "2", "0", "12", "0", "1", "152", "0", "18", "1", "3504", "0", "456", "24", "10", "135392", "0", "17520", "760", "600", "31", "8321472", "0", "1015440", "35040", "40560", "2316", "361", "784621952", "0", "87375456", "2369360", "3615360", "185556", "52682", "2164", "110521185024", "0", "10984707328", "233001216", "441616000", "19052992", "7723408", "384992", "32663" ]
[ "nonn", "tabl" ]
10
0
2
[ "A006905", "A085628", "A280202", "A355783" ]
null
Geoffrey Critzer, Jul 16 2022
2023-03-06T02:57:47
oeisdata/seq/A355/A355783.seq
885b5ed6d20032d1c9a107274fcb898c
A355784
a(n) is the number of distinct primes of the form k*(n-k)+n where 1 <= k < n.
[ "0", "1", "1", "1", "1", "1", "3", "1", "3", "2", "2", "2", "2", "2", "4", "3", "4", "1", "9", "1", "5", "5", "3", "2", "6", "3", "5", "3", "8", "4", "10", "3", "5", "5", "5", "5", "13", "1", "6", "6", "6", "6", "10", "5", "8", "4", "14", "3", "13", "4", "10", "9", "5", "5", "11", "4", "12", "5", "12", "4", "11", "4", "6", "11", "13", "4", "11", "6", "15", "12", "8", "4", "8", "5", "10", "8", "10", "3", "27", "7", "11", "15", "5", "9", "20", "7", "20", "6", "16", "5", "23" ]
[ "nonn" ]
15
1
7
[ "A355784", "A355785" ]
null
J. M. Bergot and Robert Israel, Jul 16 2022
2022-07-21T07:45:35
oeisdata/seq/A355/A355784.seq
d22e423d7413092d4014f7f3e617526f
A355785
a(n) is the least k such that A355784(k) = n, or -1 if there is no such k.
[ "1", "2", "10", "7", "15", "21", "25", "80", "29", "19", "31", "55", "57", "37", "47", "69", "89", "172", "115", "164", "85", "109", "129", "91", "117", "207", "97", "79", "135", "184", "219", "275", "177", "121", "304", "127", "279", "211", "201", "157", "235", "281", "425", "199", "329", "389", "169", "239", "297", "365", "267", "461", "187", "217", "331", "373", "277", "327", "415", "460", "790", "325", "307", "351" ]
[ "nonn" ]
16
0
2
[ "A355784", "A355785" ]
null
J. M. Bergot and Robert Israel, Jul 16 2022
2023-08-28T08:21:04
oeisdata/seq/A355/A355785.seq
f01f0e4f09e1fd4f102941aeede3a61a
A355786
E.g.f. satisfies A(x) = 1/(1 - 2*x)^(A(x)/2).
[ "1", "1", "5", "42", "497", "7620", "143979", "3241406", "84847489", "2534788296", "85170416115", "3180919433802", "130771002469953", "5869920100483452", "285705285804636411", "14989889385040915830", "843420165009747027969", "50664760467069168337680", "3236433107379299238343779" ]
[ "nonn" ]
11
0
3
[ "A052813", "A355779", "A355786" ]
null
Seiichi Manyama, Jul 17 2022
2022-07-18T12:22:37
oeisdata/seq/A355/A355786.seq
fa47f9f13f96df3c389dc7fe4a135071
A355787
E.g.f. satisfies A(x) = (1 + 2*x)^(A(x)/2).
[ "1", "1", "1", "6", "17", "220", "939", "20930", "107393", "3823416", "20382195", "1147905462", "5519388225", "515034742404", "1817577994491", "323878306632330", "481078381979649", "272556878473903344", "-355395800536648605", "296393140746445749246", "-1420979986049970526335" ]
[ "sign" ]
10
0
4
[ "A033917", "A355780", "A355787" ]
null
Seiichi Manyama, Jul 17 2022
2022-07-17T11:01:38
oeisdata/seq/A355/A355787.seq
33038ffdb8c9fe2e8bdfa8d5e6326d40
A355788
E.g.f. satisfies log(A(x)) = (exp(2*x) - 1) * A(x)/2.
[ "1", "1", "5", "38", "409", "5772", "101227", "2126966", "52153185", "1462998168", "46232500275", "1625693415898", "62972266884721", "2664713395180228", "122315552809623323", "6053803331878334590", "321389617069279569345", "18218906261462603910704", "1098415656103838009681123" ]
[ "nonn" ]
10
0
3
[ "A052880", "A355781", "A355788" ]
null
Seiichi Manyama, Jul 17 2022
2022-07-18T12:26:58
oeisdata/seq/A355/A355788.seq
aaa0df88f800c5c519d6f4c0efede254
A355789
E.g.f. satisfies log(A(x)) = (1 - exp(-2*x)) * A(x)/2.
[ "1", "1", "1", "2", "9", "52", "363", "3082", "30817", "353640", "4582451", "66201126", "1055059569", "18388749628", "347959910171", "7104264359810", "155670829426113", "3644019928871376", "90755590315468003", "2396199304577668190", "66855611152288637713", "1965490144910199279780" ]
[ "nonn" ]
11
0
4
[ "A058864", "A355782", "A355789" ]
null
Seiichi Manyama, Jul 17 2022
2022-07-18T12:32:42
oeisdata/seq/A355/A355789.seq
0957a62a6a03b9fd26f663bbdea5a9af
A355790
Numbers that can be written as the product of two divisors greater than 1 such that the number is contained in the string concatenation of the divisors.
[ "64", "95", "110", "210", "325", "510", "624", "640", "664", "950", "995", "1010", "1100", "1110", "3250", "3325", "5134", "6240", "6400", "6640", "6664", "7125", "7616", "8145", "9500", "9950", "9995", "11000", "11100", "11110", "20100", "21052", "21175", "25100", "26208", "32500", "33250", "33325", "35126", "50100", "51020", "51204", "51340", "57125", "62400", "64000", "65114" ]
[ "nonn", "base" ]
25
1
1
[ "A027748", "A027750", "A030190", "A048991", "A077293", "A210959", "A330027", "A339144", "A341035", "A342127", "A355790", "A355791", "A355852" ]
null
Scott R. Shannon, Jul 17 2022
2022-07-29T09:55:41
oeisdata/seq/A355/A355790.seq
59489248305382b63cf9419ae8b21593
A355791
Numbers that can be written as the product of two divisors greater than 1 such that the number in binary is contained in the string concatenation of the divisors in binary.
[ "6", "10", "12", "14", "24", "28", "30", "36", "42", "48", "56", "57", "60", "62", "96", "112", "120", "124", "126", "136", "170", "192", "224", "240", "248", "252", "254", "292", "355", "384", "448", "480", "496", "504", "508", "510", "528", "682", "737", "768", "896", "921", "960", "992", "1008", "1016", "1020", "1022", "1536", "1792", "1920", "1984", "2016", "2032", "2040", "2044", "2046", "2080", "2184", "2340" ]
[ "nonn", "base" ]
15
1
1
[ "A027750", "A030190", "A210959", "A355790", "A355791", "A355852", "A355857" ]
null
Scott R. Shannon, Jul 17 2022
2022-07-27T16:36:19
oeisdata/seq/A355/A355791.seq
0374e0c17e85b0830e4531e3c1651eff
A355792
Triangular array, read by rows. The rules of the construction are described in the Comments section.
[ "1", "1", "2", "2", "3", "1", "1", "2", "4", "3", "3", "1", "2", "4", "5", "5", "6", "3", "1", "2", "4", "4", "5", "6", "3", "1", "7", "2", "2", "4", "5", "8", "6", "3", "1", "7", "7", "2", "4", "5", "8", "6", "3", "1", "9", "9", "10", "7", "2", "4", "5", "8", "6", "3", "1", "1", "9", "11", "10", "7", "2", "4", "5", "8", "6", "3", "3", "1", "9", "11", "12", "10", "7", "2", "4", "5", "8", "6", "6", "3", "1", "9", "11", "12", "10", "13", "7", "2" ]
[ "nonn", "tabl" ]
37
1
3
[ "A002260", "A220073", "A355792" ]
null
Tamas Sandor Nagy, Jul 17 2022
2022-09-26T20:43:05
oeisdata/seq/A355/A355792.seq
2a3da852d94c8646fc8813e936bb6dfb
A355793
Square table, read by antidiagonals: the g.f. for row n is given recursively by (3*n-1)*x*R(n,x) = 1 + (3*n-4)*x - 1/R(n-1,x) for n >= 1 with the initial value R(0,x) = Sum_{k >= 0} A112936(k+1)*x^k.
[ "1", "1", "3", "1", "3", "15", "1", "3", "24", "111", "1", "3", "33", "282", "1131", "1", "3", "42", "507", "4236", "14943", "1", "3", "51", "786", "9609", "76548", "243915", "1", "3", "60", "1119", "17736", "212835", "1608864", "4742391", "1", "3", "69", "1506", "29103", "459768", "5350785", "38488152", "106912131", "1", "3", "78", "1947", "44196", "859143", "13333488" ]
[ "nonn", "tabl", "easy" ]
9
0
3
[ "A008544", "A111528", "A112936", "A355721", "A355793", "A355794", "A355795", "A355796", "A355797" ]
null
Peter Bala, Jul 17 2022
2022-08-15T10:28:30
oeisdata/seq/A355/A355793.seq
ad147d09c4ebea411e6353f1936e5b30
A355794
Row 1 of A355793.
[ "1", "3", "24", "282", "4236", "76548", "1608864", "38488152", "1032125136", "30670171248", "1000637672064", "35571839009952", "1368990872569536", "56720594992438848", "2517761078627172864", "119222916630934484352", "5999613754698100628736", "319763269764299852744448", "17994913747767982690289664" ]
[ "nonn", "easy" ]
11
0
2
[ "A008544", "A111528", "A112936", "A355721", "A355793", "A355794", "A355795", "A355796", "A355797" ]
null
Peter Bala, Jul 19 2022
2022-08-15T10:28:26
oeisdata/seq/A355/A355794.seq
80065f6dc576e6f414334dde42746f91
A355795
Row 2 of A355793.
[ "1", "3", "33", "507", "9609", "212835", "5350785", "149961675", "4628365305", "155913036915", "5692874399025", "224034935130075", "9456933847187625", "426402330032719875", "20460268520575152225", "1041301103429870128875", "56040353252589013121625", "3180443637298592493577875", "189863589771186976073108625" ]
[ "nonn", "easy" ]
9
0
2
[ "A008544", "A111528", "A112936", "A355721", "A355793", "A355794", "A355795", "A355796", "A355797" ]
null
Peter Bala, Jul 21 2022
2022-08-15T10:28:17
oeisdata/seq/A355/A355795.seq
248fbbe493fcbfc838658977d223b156
A355796
Row 3 of A355793.
[ "1", "3", "42", "786", "17736", "459768", "13333488", "425600976", "14791250688", "555381292800", "22398626084352", "965768866650624", "44347055502428160", "2161455366606034944", "111489317304231616512", "6069676735484389779456", "347921629212782938472448", "20950823605616500202323968", "1322561808699778749456678912" ]
[ "nonn", "easy" ]
8
0
2
[ "A008544", "A111528", "A112936", "A355721", "A355793", "A355794", "A355795", "A355796", "A355797" ]
null
Peter Bala, Jul 21 2022
2022-08-15T10:28:21
oeisdata/seq/A355/A355796.seq
15b5e63fe2b14670beb01e5be4a1626a
A355797
Row 4 of A355793.
[ "1", "3", "51", "1119", "29103", "859143", "28091463", "1002057591", "38606468343", "1595167432599", "70315835952471", "3293268346004439", "163337193581191575", "8554718468806548951", "471976737725208306327", "27369722655919760451159", "1664858070989667129693975", "106029602841882346657155543" ]
[ "nonn", "easy" ]
8
0
2
[ "A008544", "A111528", "A112936", "A355721", "A355793", "A355794", "A355795", "A355796", "A355797" ]
null
Peter Bala, Jul 21 2022
2022-08-15T10:28:13
oeisdata/seq/A355/A355797.seq
515ba783f889623b754efb4c5bb7695d
A355798
Number of regions formed in a square by straight line segments when connecting the n-1 points between each corner that divide each edge into n equal parts to the n-1 points on the edge on the opposite side of the square.
[ "1", "4", "24", "104", "316", "712", "1588", "2816", "4940", "7672", "12444", "16840", "25968", "34088", "46260", "61048", "82792", "98984", "133032", "156072", "196236", "239048", "298292", "334032", "417072", "483856", "570200", "649816", "786412", "850000", "1037628", "1145424", "1311536", "1485880", "1677660", "1828360", "2158192", "2357376", "2623604", "2852688" ]
[ "nonn" ]
22
1
2
[ "A255011", "A290131", "A331452", "A335678", "A355798", "A355799", "A355800", "A355801" ]
null
Scott R. Shannon, Jul 17 2022
2024-01-23T10:58:31
oeisdata/seq/A355/A355798.seq
801d50bc08822c90a5da9bd31d43c18a
A355799
Number of vertices formed in a square by straight line segments when connecting the n-1 points between each corner that divide each edge into n equal parts to the n-1 points on the edge on the opposite side of the square.
[ "4", "9", "25", "93", "277", "597", "1405", "2421", "4357", "6661", "11261", "14593", "23625", "30121", "41453", "54477", "75985", "87677", "122433", "139461", "177965", "216017", "275733", "298805", "383497", "439909", "522473", "588597", "729501", "763149", "963573", "1045701", "1204481", "1361789", "1546309", "1657125", "2009113", "2166617", "2418733", "2602789" ]
[ "nonn" ]
13
1
1
[ "A255011", "A290131", "A331452", "A335678", "A355798", "A355799", "A355800", "A355801" ]
null
Scott R. Shannon, Jul 17 2022
2022-07-18T09:47:42
oeisdata/seq/A355/A355799.seq
7974ae272e24d7a797c3c8a34eeb72e5
A355800
Number of edges formed in a square by straight line segments when connecting the n-1 points between each corner that divide each edge into n equal parts to the n-1 points on the edge on the opposite side of the square.
[ "4", "12", "48", "196", "592", "1308", "2992", "5236", "9296", "14332", "23704", "31432", "49592", "64208", "87712", "115524", "158776", "186660", "255464", "295532", "374200", "455064", "574024", "632836", "800568", "923764", "1092672", "1238412", "1515912", "1613148", "2001200", "2191124", "2516016", "2847668", "3223968", "3485484", "4167304", "4523992", "5042336" ]
[ "nonn" ]
8
1
1
[ "A255011", "A290131", "A331452", "A335678", "A355798", "A355799", "A355800", "A355801" ]
null
Scott R. Shannon, Jul 17 2022
2022-07-18T09:47:37
oeisdata/seq/A355/A355800.seq
9bc0c1a3995c64da8aa5cafa10505e30