A246812 - cp's OEIS frontend

A246812 G.f.: Sum_{n>=0} x^n / (1-x)^(2n+1) [Sum_{k=0..n} C(n,k)^2 * x^k] * [Sum_{k=0..n} C(n,k)^2 * 3^k * x^k].

n	a(n)
0	1
1	2
2	9
3	44
4	241
5	1374
6	8145
7	49512
8	306729
9	1927802
10	12256753
11	78661620
12	508786129
13	3312561638
14	21688815729
15	142699137072
16	942873631497
17	6253352120322
18	41611854129585
19	277723513754364
20	1858529465302329
21	12467403845702526
22	83817799189753785
23	564633483609422808
24	3810607016379076521

[1, 2, 9, 44, 241, 1374, 8145, 49512, 306729, 1927802, 12256753, 78661620, 508786129, 3312561638, 21688815729, 142699137072, 942873631497, 6253352120322, 41611854129585, 277723513754364, 1858529465302329, 12467403845702526, 83817799189753785, 564633483609422808, 3810607016379076521]

cp's OEIS Frontend

A246812 G.f.: Sum_{n>=0} x^n / (1-x)^(2n+1) [Sum_{k=0..n} C(n,k)^2 * x^k] * [Sum_{k=0..n} C(n,k)^2 * 3^k * x^k].

Table of values

List of values

cp's OEIS Frontend

A246812 G.f.: Sum_{n>=0} x^n / (1-x)^(2*n+1) * [Sum_{k=0..n} C(n,k)^2 * x^k] * [Sum_{k=0..n} C(n,k)^2 * 3^k * x^k].

Table of values

List of values

A246812 G.f.: Sum_{n>=0} x^n / (1-x)^(2n+1) [Sum_{k=0..n} C(n,k)^2 * x^k] * [Sum_{k=0..n} C(n,k)^2 * 3^k * x^k].