A291699 - cp's OEIS frontend

A291699 a(n) = n^n(2n)!/(n!*(n + 1)!).

n	a(n)
0	1
1	1
2	8
3	135
4	3584
5	131250
6	6158592
7	353299947
8	23991418880
9	1883638417518
10	167960000000000
11	16772331868538246
12	1854655886442627072
13	225005916687384753700
14	29718395534545380311040
15	4245313393689422607421875
16	652233889532678001886494720
17	107247390031799133661006687830

[1, 1, 8, 135, 3584, 131250, 6158592, 353299947, 23991418880, 1883638417518, 167960000000000, 16772331868538246, 1854655886442627072, 225005916687384753700, 29718395534545380311040, 4245313393689422607421875, 652233889532678001886494720, 107247390031799133661006687830]

cp's OEIS Frontend

A291699 a(n) = n^n(2n)!/(n!*(n + 1)!).

Table of values

List of values

cp's OEIS Frontend

A291699 a(n) = n^n*(2*n)!/(n!*(n + 1)!).

Table of values

List of values

A291699 a(n) = n^n(2n)!/(n!*(n + 1)!).