A200074 - cp's OEIS frontend

A200074 G.f. satisfies A(x) = (1 + xA(x)^2)(1 + x^2*A(x)).

n	a(n)
0	1
1	1
2	3
3	9
4	30
5	108
6	406
7	1577
8	6280
9	25499
10	105169
11	439388
12	1855636
13	7908909
14	33975250
15	146954693
16	639460707
17	2797384235
18	12295494109
19	54272825103
20	240480529815
21	1069257987503
22	4769306203838
23	21334400243252
24	95687482105807
25	430217846136134
26	1938651904470374
27	8754225470415889

[1, 1, 3, 9, 30, 108, 406, 1577, 6280, 25499, 105169, 439388, 1855636, 7908909, 33975250, 146954693, 639460707, 2797384235, 12295494109, 54272825103, 240480529815, 1069257987503, 4769306203838, 21334400243252, 95687482105807, 430217846136134, 1938651904470374, 8754225470415889]

cp's OEIS Frontend

A200074 G.f. satisfies A(x) = (1 + xA(x)^2)(1 + x^2*A(x)).

Table of values

List of values

cp's OEIS Frontend

A200074 G.f. satisfies A(x) = (1 + x*A(x)^2)*(1 + x^2*A(x)).

Table of values

List of values

A200074 G.f. satisfies A(x) = (1 + xA(x)^2)(1 + x^2*A(x)).