A307566 - cp's OEIS frontend

A307566 Expansion of Product_{j>=1} (1 + j(-1 + Product_{k>=1} (1 + kx^k))^j).

n	a(n)
0	1
1	1
2	4
3	18
4	72
5	289
6	1119
7	4301
8	16408
9	62313
10	234914
11	879822
12	3274623
13	12125348
14	44707778
15	164258803
16	601535222
17	2195926654
18	7990792367
19	28985219498
20	104811279467
21	377875493610
22	1358584361039
23	4872111113570
24	17431266435024
25	62229179950735
26	221699783190996
27	788274748711694

[1, 1, 4, 18, 72, 289, 1119, 4301, 16408, 62313, 234914, 879822, 3274623, 12125348, 44707778, 164258803, 601535222, 2195926654, 7990792367, 28985219498, 104811279467, 377875493610, 1358584361039, 4872111113570, 17431266435024, 62229179950735, 221699783190996, 788274748711694]

cp's OEIS Frontend

A307566 Expansion of Product_{j>=1} (1 + j(-1 + Product_{k>=1} (1 + kx^k))^j).

Table of values

List of values

cp's OEIS Frontend

A307566 Expansion of Product_{j>=1} (1 + j*(-1 + Product_{k>=1} (1 + k*x^k))^j).

Table of values

List of values

A307566 Expansion of Product_{j>=1} (1 + j(-1 + Product_{k>=1} (1 + kx^k))^j).