A076795 - OEIS

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A076795 as a simple table

n	a(n)
0	0
1	1
2	2
3	5
4	20
5	125
6	1070
7	11465
8	146600
9	2173625
10	36633050
11	691362125
12	14440672700
13	330674815925
14	8236528396550
15	221694575073425
16	6411977928702800
17	198310761891213425
18	6530970632654064050

[0,1,2,5,20,125,1070,11465,146600,2173625, 36633050,691362125,14440672700,330674815925, 8236528396550,221694575073425,6411977928702800, 198310761891213425,6530970632654064050]