A246455 - cp's OEIS frontend

A246455 G.f.: Sum_{n>=0} x^n / (1-2x)^(2n+1) * [Sum_{k=0..n} C(n,k)^2 * x^k] * [Sum_{k=0..n} C(n,k)^2 * 2^k * x^k].

n	a(n)
0	1
1	3
2	14
3	75
4	439
5	2718
6	17483
7	115575
8	779716
9	5342937
10	37065029
11	259694334
12	1834494025
13	13048232853
14	93352065596
15	671245767795
16	4847769647701
17	35145881098272
18	255674861620439
19	1865618971630305
20	13650358024120804
21	100123485522075447
22	736036670999528711

[1, 3, 14, 75, 439, 2718, 17483, 115575, 779716, 5342937, 37065029, 259694334, 1834494025, 13048232853, 93352065596, 671245767795, 4847769647701, 35145881098272, 255674861620439, 1865618971630305, 13650358024120804, 100123485522075447, 736036670999528711]

cp's OEIS Frontend

A246455 G.f.: Sum_{n>=0} x^n / (1-2x)^(2n+1) * [Sum_{k=0..n} C(n,k)^2 * x^k] * [Sum_{k=0..n} C(n,k)^2 * 2^k * x^k].

Table of values

List of values

cp's OEIS Frontend

A246455 G.f.: Sum_{n>=0} x^n / (1-2*x)^(2*n+1) * [Sum_{k=0..n} C(n,k)^2 * x^k] * [Sum_{k=0..n} C(n,k)^2 * 2^k * x^k].

Table of values

List of values

A246455 G.f.: Sum_{n>=0} x^n / (1-2x)^(2n+1) * [Sum_{k=0..n} C(n,k)^2 * x^k] * [Sum_{k=0..n} C(n,k)^2 * 2^k * x^k].