A246423 - cp's OEIS frontend

A246423 G.f.: Sum_{n>=0} x^n / (1-3x)^(2n+1) * [Sum_{k=0..n} C(n,k)^2 * 2^k * x^k] * [Sum_{k=0..n} C(n,k)^2 * 3^k * x^k].

n	a(n)
0	1
1	4
2	24
3	168
4	1286
5	10440
6	88112
7	764368
8	6766278
9	60828024
10	553529808
11	5086837680
12	47127896444
13	439608960656
14	4124536224864
15	38891699480992
16	368326082421446
17	3501654020899800
18	33403335855108368
19	319612386771594608
20	3066480362268978804
21	29493401582426082032
22	284301304326376855200

[1, 4, 24, 168, 1286, 10440, 88112, 764368, 6766278, 60828024, 553529808, 5086837680, 47127896444, 439608960656, 4124536224864, 38891699480992, 368326082421446, 3501654020899800, 33403335855108368, 319612386771594608, 3066480362268978804, 29493401582426082032, 284301304326376855200]

cp's OEIS Frontend

A246423 G.f.: Sum_{n>=0} x^n / (1-3x)^(2n+1) * [Sum_{k=0..n} C(n,k)^2 * 2^k * x^k] * [Sum_{k=0..n} C(n,k)^2 * 3^k * x^k].

Table of values

List of values

cp's OEIS Frontend

A246423 G.f.: Sum_{n>=0} x^n / (1-3*x)^(2*n+1) * [Sum_{k=0..n} C(n,k)^2 * 2^k * x^k] * [Sum_{k=0..n} C(n,k)^2 * 3^k * x^k].

Table of values

List of values

A246423 G.f.: Sum_{n>=0} x^n / (1-3x)^(2n+1) * [Sum_{k=0..n} C(n,k)^2 * 2^k * x^k] * [Sum_{k=0..n} C(n,k)^2 * 3^k * x^k].