A380291 - cp's OEIS frontend

A380291 a(n) = [x^n] G(x)^n, where G(x) = Product_{k >= 1} (1 + x^k)^(k^2) is the g.f. of A027998.

n	a(n)
0	1
1	1
2	9
3	64
4	425
5	3026
6	21672
7	157095
8	1149289
9	8464240
10	62683134
11	466307865
12	3482008904
13	26083955002
14	195932407939
15	1475267031164
16	11131100990825
17	84140066313620
18	637054366975740
19	4830417047590165
20	36674477204674750
21	278779034863684377
22	2121418004609211361
23	16159262748227985561

[1, 1, 9, 64, 425, 3026, 21672, 157095, 1149289, 8464240, 62683134, 466307865, 3482008904, 26083955002, 195932407939, 1475267031164, 11131100990825, 84140066313620, 637054366975740, 4830417047590165, 36674477204674750, 278779034863684377, 2121418004609211361, 16159262748227985561]

cp's OEIS Frontend

A380291 a(n) = [x^n] G(x)^n, where G(x) = Product_{k >= 1} (1 + x^k)^(k^2) is the g.f. of A027998.

Table of values

List of values