A200475 - cp's OEIS frontend

A200475 G.f. satisfies: A(x) = exp( Sum_{n>=1} (Sum_{k=0..2n} A027907(n,k)^2 x^k * A(x)^(2k)) x^n*A(x)^n/n ), where A027907 is the triangle of trinomial coefficients.

n	a(n)
0	1
1	1
2	3
3	13
4	65
5	350
6	1981
7	11627
8	70132
9	432090
10	2707595
11	17202779
12	110563543
13	717547090
14	4695774335
15	30952628861
16	205318395288
17	1369539030021
18	9180527051187
19	61813112864984
20	417850301293691
21	2834802846097200
22	19294989810689802
23	131723105933867817
24	901709774424393614

[1, 1, 3, 13, 65, 350, 1981, 11627, 70132, 432090, 2707595, 17202779, 110563543, 717547090, 4695774335, 30952628861, 205318395288, 1369539030021, 9180527051187, 61813112864984, 417850301293691, 2834802846097200, 19294989810689802, 131723105933867817, 901709774424393614]

cp's OEIS Frontend

A200475 G.f. satisfies: A(x) = exp( Sum_{n>=1} (Sum_{k=0..2n} A027907(n,k)^2 x^k * A(x)^(2k)) x^n*A(x)^n/n ), where A027907 is the triangle of trinomial coefficients.

Table of values

List of values

cp's OEIS Frontend

A200475 G.f. satisfies: A(x) = exp( Sum_{n>=1} (Sum_{k=0..2*n} A027907(n,k)^2 * x^k * A(x)^(2*k)) * x^n*A(x)^n/n ), where A027907 is the triangle of trinomial coefficients.

Table of values

List of values

A200475 G.f. satisfies: A(x) = exp( Sum_{n>=1} (Sum_{k=0..2n} A027907(n,k)^2 x^k * A(x)^(2k)) x^n*A(x)^n/n ), where A027907 is the triangle of trinomial coefficients.