A246540 - cp's OEIS frontend

A246540 G.f.: Sum_{n>=0} 4^n * x^n / (1-x)^(2n+1) [Sum_{k=0..n} C(n,k)^2 * x^k]^2.

n	a(n)
0	1
1	5
2	37
3	325
4	3125
5	31925
6	339077
7	3700645
8	41200981
9	465736725
10	5328229797
11	61552244485
12	716791570549
13	8403794763125
14	99096946864325
15	1174370518273125
16	13977636401394069
17	167001257979441365
18	2002052157653251557
19	24073717683854557125
20	290261630170911545525
21	3508332484300450371125

[1, 5, 37, 325, 3125, 31925, 339077, 3700645, 41200981, 465736725, 5328229797, 61552244485, 716791570549, 8403794763125, 99096946864325, 1174370518273125, 13977636401394069, 167001257979441365, 2002052157653251557, 24073717683854557125, 290261630170911545525, 3508332484300450371125]

cp's OEIS Frontend

A246540 G.f.: Sum_{n>=0} 4^n * x^n / (1-x)^(2n+1) [Sum_{k=0..n} C(n,k)^2 * x^k]^2.

Table of values

List of values

cp's OEIS Frontend

A246540 G.f.: Sum_{n>=0} 4^n * x^n / (1-x)^(2*n+1) * [Sum_{k=0..n} C(n,k)^2 * x^k]^2.

Table of values

List of values

A246540 G.f.: Sum_{n>=0} 4^n * x^n / (1-x)^(2n+1) [Sum_{k=0..n} C(n,k)^2 * x^k]^2.