A305654 - cp's OEIS frontend

A305654 a(n) = [x^n] exp(Sum_{k>=1} x^k(1 + x^k)/(k(1 - x^k)^n)).

n	a(n)
0	1
1	1
2	4
3	14
4	65
5	323
6	1890
7	12002
8	83901
9	630818
10	5081318
11	43546333
12	395422430
13	3788368227
14	38151667046
15	402516707510
16	4436230390977
17	50948789415297
18	608433141666219
19	7540823673023319
20	96826154085714992
21	1285991546051286085
22	17640769457638701839
23	249602608552024560609

[1, 1, 4, 14, 65, 323, 1890, 12002, 83901, 630818, 5081318, 43546333, 395422430, 3788368227, 38151667046, 402516707510, 4436230390977, 50948789415297, 608433141666219, 7540823673023319, 96826154085714992, 1285991546051286085, 17640769457638701839, 249602608552024560609]

cp's OEIS Frontend

A305654 a(n) = [x^n] exp(Sum_{k>=1} x^k(1 + x^k)/(k(1 - x^k)^n)).

Table of values

List of values

cp's OEIS Frontend

A305654 a(n) = [x^n] exp(Sum_{k>=1} x^k*(1 + x^k)/(k*(1 - x^k)^n)).

Table of values

List of values

A305654 a(n) = [x^n] exp(Sum_{k>=1} x^k(1 + x^k)/(k(1 - x^k)^n)).