A218575 - cp's OEIS frontend

A218575 G.f.: exp( Sum_{n>=1} x^n/n * Product_{k>=1} 1/(1 - x^(nk)(1 + x^k)^n) ).

n	a(n)
0	1
1	1
2	2
3	5
4	11
5	26
6	56
7	125
8	269
9	578
10	1228
11	2600
12	5447
13	11366
14	23575
15	48664
16	99950
17	204383
18	416196
19	844299
20	1706368
21	3436555
22	6898255
23	13803732
24	27539833
25	54788703
26	108703105
27	215112006
28	424628345
29	836218453
30	1643005834
31	3221104945
32	6301628342
33	12303151494

[1, 1, 2, 5, 11, 26, 56, 125, 269, 578, 1228, 2600, 5447, 11366, 23575, 48664, 99950, 204383, 416196, 844299, 1706368, 3436555, 6898255, 13803732, 27539833, 54788703, 108703105, 215112006, 424628345, 836218453, 1643005834, 3221104945, 6301628342, 12303151494]

cp's OEIS Frontend

A218575 G.f.: exp( Sum_{n>=1} x^n/n * Product_{k>=1} 1/(1 - x^(nk)(1 + x^k)^n) ).

Table of values

List of values

cp's OEIS Frontend

A218575 G.f.: exp( Sum_{n>=1} x^n/n * Product_{k>=1} 1/(1 - x^(n*k)*(1 + x^k)^n) ).

Table of values

List of values

A218575 G.f.: exp( Sum_{n>=1} x^n/n * Product_{k>=1} 1/(1 - x^(nk)(1 + x^k)^n) ).