A216616 - cp's OEIS frontend

A216616 G.f. satisfies: A(x) = (1 + x(1-x)A(x)) * (1 + x^2*A(x)^2).

n	a(n)
0	1
1	1
2	1
3	3
4	7
5	15
6	39
7	103
8	267
9	719
10	1975
11	5447
12	15199
13	42863
14	121647
15	347455
16	998559
17	2884143
18	8367599
19	24377503
20	71282351
21	209132511
22	615447711
23	1816255583
24	5373748287
25	15937008575
26	47368376255
27	141075930495
28	420957812863
29	1258317356799
30	3767538459391

[1, 1, 1, 3, 7, 15, 39, 103, 267, 719, 1975, 5447, 15199, 42863, 121647, 347455, 998559, 2884143, 8367599, 24377503, 71282351, 209132511, 615447711, 1816255583, 5373748287, 15937008575, 47368376255, 141075930495, 420957812863, 1258317356799, 3767538459391]

cp's OEIS Frontend

A216616 G.f. satisfies: A(x) = (1 + x(1-x)A(x)) * (1 + x^2*A(x)^2).

Table of values

List of values

cp's OEIS Frontend

A216616 G.f. satisfies: A(x) = (1 + x*(1-x)*A(x)) * (1 + x^2*A(x)^2).

Table of values

List of values

A216616 G.f. satisfies: A(x) = (1 + x(1-x)A(x)) * (1 + x^2*A(x)^2).