A120920 - cp's OEIS frontend

A120920 G.f. satisfies: A(x) = G(x)^3 * A(x^4G(x)^9), where G(x) is the g.f. of the number of ternary trees (A001764): G(x) = 1 + xG(x)^3.

n	a(n)
0	1
1	3
2	12
3	55
4	276
5	1464
6	8058
7	45543
8	262626
9	1538607
10	9130446
11	54761628
12	331403447
13	2021021082
14	12407102937
15	76611488305
16	475493441604
17	2964664310319
18	18560063203353
19	116621922800283
20	735236268006654

[1, 3, 12, 55, 276, 1464, 8058, 45543, 262626, 1538607, 9130446, 54761628, 331403447, 2021021082, 12407102937, 76611488305, 475493441604, 2964664310319, 18560063203353, 116621922800283, 735236268006654]

cp's OEIS Frontend

A120920 G.f. satisfies: A(x) = G(x)^3 * A(x^4G(x)^9), where G(x) is the g.f. of the number of ternary trees (A001764): G(x) = 1 + xG(x)^3.

Table of values

List of values

cp's OEIS Frontend

A120920 G.f. satisfies: A(x) = G(x)^3 * A(x^4*G(x)^9), where G(x) is the g.f. of the number of ternary trees (A001764): G(x) = 1 + x*G(x)^3.

Table of values

List of values

A120920 G.f. satisfies: A(x) = G(x)^3 * A(x^4G(x)^9), where G(x) is the g.f. of the number of ternary trees (A001764): G(x) = 1 + xG(x)^3.