A216447 - cp's OEIS frontend

A216447 G.f. satisfies: A(x) = (1 + x(1-x)A(x)^2) * (1 + x^2*A(x)^2).

n	a(n)
0	1
1	1
2	2
3	6
4	19
5	64
6	228
7	841
8	3181
9	12277
10	48156
11	191400
12	769168
13	3120044
14	12758080
15	52533265
16	217637308
17	906511243
18	3793989118
19	15947205096
20	67290484581
21	284934164506
22	1210374907352
23	5156562941596
24	22027291990432
25	94325712634264
26	404842107811880

[1, 1, 2, 6, 19, 64, 228, 841, 3181, 12277, 48156, 191400, 769168, 3120044, 12758080, 52533265, 217637308, 906511243, 3793989118, 15947205096, 67290484581, 284934164506, 1210374907352, 5156562941596, 22027291990432, 94325712634264, 404842107811880]

cp's OEIS Frontend

A216447 G.f. satisfies: A(x) = (1 + x(1-x)A(x)^2) * (1 + x^2*A(x)^2).

Table of values

List of values

cp's OEIS Frontend

A216447 G.f. satisfies: A(x) = (1 + x*(1-x)*A(x)^2) * (1 + x^2*A(x)^2).

Table of values

List of values

A216447 G.f. satisfies: A(x) = (1 + x(1-x)A(x)^2) * (1 + x^2*A(x)^2).