A206639 - cp's OEIS frontend

A206639 G.f. A(x) satisfies A(x) = Sum_{n>=0} x^(n^2) * A(x)^(2n) / Product_{k=1..n} (1 - x^kA(x))^2.

n	a(n)
0	1
1	1
2	4
3	18
4	91
5	489
6	2751
7	15985
8	95218
9	578324
10	3568084
11	22299964
12	140885754
13	898292262
14	5772951668
15	37355908797
16	243184468271
17	1591567315702
18	10465836784159
19	69114490893596
20	458171948148640
21	3047865264442504
22	20339282134624054
23	136122586785459512

[1, 1, 4, 18, 91, 489, 2751, 15985, 95218, 578324, 3568084, 22299964, 140885754, 898292262, 5772951668, 37355908797, 243184468271, 1591567315702, 10465836784159, 69114490893596, 458171948148640, 3047865264442504, 20339282134624054, 136122586785459512]

cp's OEIS Frontend

A206639 G.f. A(x) satisfies A(x) = Sum_{n>=0} x^(n^2) * A(x)^(2n) / Product_{k=1..n} (1 - x^kA(x))^2.

Table of values

List of values

cp's OEIS Frontend

A206639 G.f. A(x) satisfies A(x) = Sum_{n>=0} x^(n^2) * A(x)^(2*n) / Product_{k=1..n} (1 - x^k*A(x))^2.

Table of values

List of values

A206639 G.f. A(x) satisfies A(x) = Sum_{n>=0} x^(n^2) * A(x)^(2n) / Product_{k=1..n} (1 - x^kA(x))^2.