A120899 - cp's OEIS frontend

A120899 G.f. satisfies: A(x) = C(x)^2 * A(x^3*C(x)^4), where C(x) is the g.f. of the Catalan numbers (A000108).

n	a(n)
0	1
1	2
2	5
3	16
4	54
5	186
6	654
7	2338
8	8463
9	30938
10	114022
11	423096
12	1579049
13	5922512
14	22309350
15	84354388
16	320020227
17	1217689680
18	4645693038
19	17766596202
20	68092473570
21	261486788434
22	1005962436536
23	3876412305114
24	14960183283203

[1, 2, 5, 16, 54, 186, 654, 2338, 8463, 30938, 114022, 423096, 1579049, 5922512, 22309350, 84354388, 320020227, 1217689680, 4645693038, 17766596202, 68092473570, 261486788434, 1005962436536, 3876412305114, 14960183283203]

cp's OEIS Frontend

A120899 G.f. satisfies: A(x) = C(x)^2 * A(x^3*C(x)^4), where C(x) is the g.f. of the Catalan numbers (A000108).

Table of values

List of values