A318121 - cp's OEIS frontend

A318121 a(n) = [x^n] exp(Sum_{k>=1} x^k(1 + (n - 3)x^k)/(k*(1 - x^k)^4)).

n	a(n)
0	1
1	1
2	4
3	15
4	65
5	269
6	1205
7	5325
8	24064
9	108849
10	496790
11	2275492
12	10470720
13	48325984
14	223721404
15	1038182441
16	4828274432
17	22497132116
18	105001996350
19	490816448220
20	2297356108318
21	10766317435860
22	50511178395306
23	237217429972191
24	1115084064063866
25	5246116796164594

[1, 1, 4, 15, 65, 269, 1205, 5325, 24064, 108849, 496790, 2275492, 10470720, 48325984, 223721404, 1038182441, 4828274432, 22497132116, 105001996350, 490816448220, 2297356108318, 10766317435860, 50511178395306, 237217429972191, 1115084064063866, 5246116796164594]

cp's OEIS Frontend

A318121 a(n) = [x^n] exp(Sum_{k>=1} x^k(1 + (n - 3)x^k)/(k*(1 - x^k)^4)).

Table of values

List of values

cp's OEIS Frontend

A318121 a(n) = [x^n] exp(Sum_{k>=1} x^k*(1 + (n - 3)*x^k)/(k*(1 - x^k)^4)).

Table of values

List of values

A318121 a(n) = [x^n] exp(Sum_{k>=1} x^k(1 + (n - 3)x^k)/(k*(1 - x^k)^4)).