A322746 - cp's OEIS frontend

A322746 a(n) = 1/2 * (-1 + Sum_{k=0..n} binomial(2n,2k)(n+1)^(n-k)n^k).

n	a(n)
0	0
1	1
2	24
3	675
4	25920
5	1275125
6	76545000
7	5425069447
8	443365544448
9	41047124680809
10	4245890890571000
11	485307363135371051
12	60742714406414040000
13	8262695239025750162653
14	1213734518568509516047560
15	191478489107270936785743375
16	32288451913272713227175006208

[0, 1, 24, 675, 25920, 1275125, 76545000, 5425069447, 443365544448, 41047124680809, 4245890890571000, 485307363135371051, 60742714406414040000, 8262695239025750162653, 1213734518568509516047560, 191478489107270936785743375, 32288451913272713227175006208]

cp's OEIS Frontend

A322746 a(n) = 1/2 * (-1 + Sum_{k=0..n} binomial(2n,2k)(n+1)^(n-k)n^k).

Table of values

List of values

cp's OEIS Frontend

A322746 a(n) = 1/2 * (-1 + Sum_{k=0..n} binomial(2*n,2*k)*(n+1)^(n-k)*n^k).

Table of values

List of values

A322746 a(n) = 1/2 * (-1 + Sum_{k=0..n} binomial(2n,2k)(n+1)^(n-k)n^k).