A217138 - cp's OEIS frontend

A217138 G.f. A(x) satisfies A(x) = 1 + xA(x)^2(A(x) + A(-x))/2.

n	a(n)
0	1
1	1
2	2
3	7
4	22
5	94
6	340
7	1579
8	6118
9	29746
10	120060
11	600934
12	2492028
13	12725756
14	53798888
15	278786739
16	1195684230
17	6265816042
18	27175425004
19	143671870034
20	628705751828
21	3347680236132
22	14756641134872
23	79039468217086
24	350529497005532
25	1886818634445044
26	8410852483002200

[1, 1, 2, 7, 22, 94, 340, 1579, 6118, 29746, 120060, 600934, 2492028, 12725756, 53798888, 278786739, 1195684230, 6265816042, 27175425004, 143671870034, 628705751828, 3347680236132, 14756641134872, 79039468217086, 350529497005532, 1886818634445044, 8410852483002200]

cp's OEIS Frontend

A217138 G.f. A(x) satisfies A(x) = 1 + xA(x)^2(A(x) + A(-x))/2.

Table of values

List of values

cp's OEIS Frontend

A217138 G.f. A(x) satisfies A(x) = 1 + x*A(x)^2*(A(x) + A(-x))/2.

Table of values

List of values

A217138 G.f. A(x) satisfies A(x) = 1 + xA(x)^2(A(x) + A(-x))/2.