A172387 - cp's OEIS frontend

A172387 G.f. satisfies: A(x) = x + x*Sum_{n>=1} G_{n}(x)^n, where G_{n}(x) is the n-th iteration of A(x) defined by G{n}(x) = G_{n-1}(A(x)) with G_0(x)=x.

n	a(n)
0	1
1	1
2	2
3	7
4	33
5	187
6	1208
7	8626
8	66782
9	553355
10	4862938
11	45025668
12	437029462
13	4429568600
14	46738108168
15	512097036882
16	5814415004953
17	68293044651990
18	828547526906649
19	10369747261970151
20	133732024450930096

[1, 1, 2, 7, 33, 187, 1208, 8626, 66782, 553355, 4862938, 45025668, 437029462, 4429568600, 46738108168, 512097036882, 5814415004953, 68293044651990, 828547526906649, 10369747261970151, 133732024450930096]

cp's OEIS Frontend

A172387 G.f. satisfies: A(x) = x + x*Sum_{n>=1} G_{n}(x)^n, where G_{n}(x) is the n-th iteration of A(x) defined by G{n}(x) = G_{n-1}(A(x)) with G_0(x)=x.

Table of values

List of values