A153295 - cp's OEIS frontend

A153295 G.f.: A(x) = F(xG(x)^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	1
2	4
3	20
4	110
5	638
6	3828
7	23515
8	146972
9	930869
10	5958094
11	38462190
12	250054804
13	1635421543
14	10750864640
15	70987129653
16	470542935654
17	3129729034478
18	20880459397920
19	139689406647522
20	936832986074664
21	6297064070279195

[1, 1, 4, 20, 110, 638, 3828, 23515, 146972, 930869, 5958094, 38462190, 250054804, 1635421543, 10750864640, 70987129653, 470542935654, 3129729034478, 20880459397920, 139689406647522, 936832986074664, 6297064070279195]

cp's OEIS Frontend

A153295 G.f.: A(x) = F(xG(x)^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

A153295 G.f.: A(x) = F(x*G(x)^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

A153295 G.f.: A(x) = F(xG(x)^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.