A182968 - cp's OEIS frontend

A182968 G.f.: A(x) = Product_{n>=1} 1/(1 - G_n(x)^n) where G(x) = x+x^2 and G_n(x) denotes the n-th iteration of G(x): G_n(x) = G_{n-1}(G(x)) with G_0(x)=x.

n	a(n)
0	1
1	1
2	3
3	9
4	31
5	121
6	540
7	2692
8	14938
9	91599
10	613393
11	4443653
12	34574511
13	287092372
14	2529894464
15	23546940208
16	230556268991
17	2366688840376
18	25394369705598
19	284078044017592
20	3305577581826931
21	39928510807691616
22	499751895103778173

[1, 1, 3, 9, 31, 121, 540, 2692, 14938, 91599, 613393, 4443653, 34574511, 287092372, 2529894464, 23546940208, 230556268991, 2366688840376, 25394369705598, 284078044017592, 3305577581826931, 39928510807691616, 499751895103778173]

cp's OEIS Frontend

A182968 G.f.: A(x) = Product_{n>=1} 1/(1 - G_n(x)^n) where G(x) = x+x^2 and G_n(x) denotes the n-th iteration of G(x): G_n(x) = G_{n-1}(G(x)) with G_0(x)=x.

Table of values

List of values