A153390 - cp's OEIS frontend

A153390 G.f.: A(x) = F(xG(x))^2 where F(x) = G(xF(x)) = 1 + xF(x)^3 is the g.f. of A001764 and G(x) = F(x/G(x)) = 1 + xG(x)^2 is the g.f. of A000108 (Catalan).

n	a(n)
0	1
1	2
2	9
3	48
4	278
5	1696
6	10736
7	69886
8	465019
9	3149476
10	21643433
11	150554144
12	1058101315
13	7502183626
14	53599160532
15	385494328218
16	2788827078507
17	20280590381098
18	148167425970522
19	1087007419753186
20	8004683588800899

[1, 2, 9, 48, 278, 1696, 10736, 69886, 465019, 3149476, 21643433, 150554144, 1058101315, 7502183626, 53599160532, 385494328218, 2788827078507, 20280590381098, 148167425970522, 1087007419753186, 8004683588800899]

cp's OEIS Frontend

A153390 G.f.: A(x) = F(xG(x))^2 where F(x) = G(xF(x)) = 1 + xF(x)^3 is the g.f. of A001764 and G(x) = F(x/G(x)) = 1 + xG(x)^2 is the g.f. of A000108 (Catalan).

Table of values

List of values

cp's OEIS Frontend

A153390 G.f.: A(x) = F(x*G(x))^2 where F(x) = G(x*F(x)) = 1 + x*F(x)^3 is the g.f. of A001764 and G(x) = F(x/G(x)) = 1 + x*G(x)^2 is the g.f. of A000108 (Catalan).

Table of values

List of values

A153390 G.f.: A(x) = F(xG(x))^2 where F(x) = G(xF(x)) = 1 + xF(x)^3 is the g.f. of A001764 and G(x) = F(x/G(x)) = 1 + xG(x)^2 is the g.f. of A000108 (Catalan).