A216617 - cp's OEIS frontend

A216617 G.f. satisfies: A(x) = (1 + x(1-x)A(x)^2) * (1 + x^2*A(x)).

n	a(n)
0	1
1	1
2	2
3	5
4	13
5	37
6	112
7	351
8	1130
9	3716
10	12424
11	42101
12	144277
13	499136
14	1740871
15	6114629
16	21609654
17	76786625
18	274171192
19	983187372
20	3539498904
21	12787269117
22	46345303727
23	168463177245
24	614002351108
25	2243406499930
26	8215549186628
27	30149687633264
28	110861650218443

[1, 1, 2, 5, 13, 37, 112, 351, 1130, 3716, 12424, 42101, 144277, 499136, 1740871, 6114629, 21609654, 76786625, 274171192, 983187372, 3539498904, 12787269117, 46345303727, 168463177245, 614002351108, 2243406499930, 8215549186628, 30149687633264, 110861650218443]

cp's OEIS Frontend

A216617 G.f. satisfies: A(x) = (1 + x(1-x)A(x)^2) * (1 + x^2*A(x)).

Table of values

List of values

cp's OEIS Frontend

A216617 G.f. satisfies: A(x) = (1 + x*(1-x)*A(x)^2) * (1 + x^2*A(x)).

Table of values

List of values

A216617 G.f. satisfies: A(x) = (1 + x(1-x)A(x)^2) * (1 + x^2*A(x)).