A218298 - cp's OEIS frontend

A218298 G.f. satisfies: A(x) = exp( Sum_{n>=1} x^nA(x)^n/n Sum_{k=0..2n} A084606(n,k)^2 x^k * A(x)^(2k) ), where A084606(n,k) = [x^k] (1 + 2x + 2*x^2)^n.

n	a(n)
0	1
1	1
2	6
3	37
4	274
5	2154
6	17896
7	153981
8	1361702
9	12297022
10	112935652
11	1051549970
12	9903781784
13	94183796404
14	903135799468
15	8722680673357
16	84776578857670
17	828531289070582
18	8137311780855076
19	80272417524869462
20	795011346686319212
21	7902010696389037900

[1, 1, 6, 37, 274, 2154, 17896, 153981, 1361702, 12297022, 112935652, 1051549970, 9903781784, 94183796404, 903135799468, 8722680673357, 84776578857670, 828531289070582, 8137311780855076, 80272417524869462, 795011346686319212, 7902010696389037900]

cp's OEIS Frontend

A218298 G.f. satisfies: A(x) = exp( Sum_{n>=1} x^nA(x)^n/n Sum_{k=0..2n} A084606(n,k)^2 x^k * A(x)^(2k) ), where A084606(n,k) = [x^k] (1 + 2x + 2*x^2)^n.

Table of values

List of values

cp's OEIS Frontend

A218298 G.f. satisfies: A(x) = exp( Sum_{n>=1} x^n*A(x)^n/n * Sum_{k=0..2*n} A084606(n,k)^2 * x^k * A(x)^(2*k) ), where A084606(n,k) = [x^k] (1 + 2*x + 2*x^2)^n.

Table of values

List of values

A218298 G.f. satisfies: A(x) = exp( Sum_{n>=1} x^nA(x)^n/n Sum_{k=0..2n} A084606(n,k)^2 x^k * A(x)^(2k) ), where A084606(n,k) = [x^k] (1 + 2x + 2*x^2)^n.