A172391 - cp's OEIS frontend

A172391 G.f. satisfies: A(x) = G(x/A(x))^2 and G(x)^2 = A(xG(x)^2) where G(x) = Sum_{n>=0} C(2n,n)C(2n+2,n+1)/(n+2)*x^n is the g.f. of A172392.

n	a(n)
0	1
1	8
2	12
3	0
4	28
5	0
6	264
7	0
8	3720
9	0
10	63840
11	0
12	1232432
13	0
14	25731216
15	0
16	568130552
17	0
18	13081215840
19	0
20	311178567648
21	0
22	7597974517056
23	0
24	189518147463232
25	0
26	4811962763222784
27	0
28	124028853694440640
29	0
30	3238304402221646880
31	0

[1, 8, 12, 0, 28, 0, 264, 0, 3720, 0, 63840, 0, 1232432, 0, 25731216, 0, 568130552, 0, 13081215840, 0, 311178567648, 0, 7597974517056, 0, 189518147463232, 0, 4811962763222784, 0, 124028853694440640, 0, 3238304402221646880, 0]

cp's OEIS Frontend

A172391 G.f. satisfies: A(x) = G(x/A(x))^2 and G(x)^2 = A(xG(x)^2) where G(x) = Sum_{n>=0} C(2n,n)C(2n+2,n+1)/(n+2)*x^n is the g.f. of A172392.

Table of values

List of values

cp's OEIS Frontend

A172391 G.f. satisfies: A(x) = G(x/A(x))^2 and G(x)^2 = A(x*G(x)^2) where G(x) = Sum_{n>=0} C(2*n,n)*C(2*n+2,n+1)/(n+2)*x^n is the g.f. of A172392.

Table of values

List of values

A172391 G.f. satisfies: A(x) = G(x/A(x))^2 and G(x)^2 = A(xG(x)^2) where G(x) = Sum_{n>=0} C(2n,n)C(2n+2,n+1)/(n+2)*x^n is the g.f. of A172392.