A153297 - cp's OEIS frontend

A153297 G.f.: A(x) = F(xG(x)^2)^2 where F(x) = G(x/F(x)) = 1 + xF(x)^2 is the g.f. of A000108 (Catalan) and G(x) = F(xG(x)) = 1 + xG(x)^3 is the g.f. of A001764.

n	a(n)
0	1
1	2
2	9
3	48
4	276
5	1656
6	10212
7	64190
8	409218
9	2637282
10	17143506
11	112224228
12	738926064
13	4889332266
14	32488240779
15	216664589058
16	1449568426292
17	9725637277248
18	65417353098837
19	441013558347228
20	2979206654245122

[1, 2, 9, 48, 276, 1656, 10212, 64190, 409218, 2637282, 17143506, 112224228, 738926064, 4889332266, 32488240779, 216664589058, 1449568426292, 9725637277248, 65417353098837, 441013558347228, 2979206654245122]

cp's OEIS Frontend

A153297 G.f.: A(x) = F(xG(x)^2)^2 where F(x) = G(x/F(x)) = 1 + xF(x)^2 is the g.f. of A000108 (Catalan) and G(x) = F(xG(x)) = 1 + xG(x)^3 is the g.f. of A001764.

Table of values

List of values

cp's OEIS Frontend

A153297 G.f.: A(x) = F(x*G(x)^2)^2 where F(x) = G(x/F(x)) = 1 + x*F(x)^2 is the g.f. of A000108 (Catalan) and G(x) = F(x*G(x)) = 1 + x*G(x)^3 is the g.f. of A001764.

Table of values

List of values

A153297 G.f.: A(x) = F(xG(x)^2)^2 where F(x) = G(x/F(x)) = 1 + xF(x)^2 is the g.f. of A000108 (Catalan) and G(x) = F(xG(x)) = 1 + xG(x)^3 is the g.f. of A001764.