A336293 - cp's OEIS frontend

A336293 a(n) = Sum_{k=0..n} binomial(n,k)^2 * binomial(2k,k) (n-k)!.

n	a(n)
0	1
1	3
2	16
3	116
4	1038
5	10922
6	131256
7	1766592
8	26253702
9	426173906
10	7492270416
11	141661870088
12	2864168171596
13	61621248390756
14	1404853103594128
15	33815954626749600
16	856680253728250950
17	22777071459869216850
18	633968368216974945600
19	18430976777427663053400

[1, 3, 16, 116, 1038, 10922, 131256, 1766592, 26253702, 426173906, 7492270416, 141661870088, 2864168171596, 61621248390756, 1404853103594128, 33815954626749600, 856680253728250950, 22777071459869216850, 633968368216974945600, 18430976777427663053400]

cp's OEIS Frontend

A336293 a(n) = Sum_{k=0..n} binomial(n,k)^2 * binomial(2k,k) (n-k)!.

Table of values

List of values

cp's OEIS Frontend

A336293 a(n) = Sum_{k=0..n} binomial(n,k)^2 * binomial(2*k,k) * (n-k)!.

Table of values

List of values

A336293 a(n) = Sum_{k=0..n} binomial(n,k)^2 * binomial(2k,k) (n-k)!.