A076111 - OEIS

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A076111 as a simple table

n	a(n)
0	1
1	2
2	15
3	280
4	9945
5	576576
6	49579075
7	5925744000
8	939536222625
9	190787784140800
10	48279601331512551
11	14894665739501184000
12	5502449072258318805625
13	2397950328737212204032000

[1,2,15,280,9945,576576,49579075,5925744000, 939536222625,190787784140800,48279601331512551, 14894665739501184000,5502449072258318805625, 2397950328737212204032000]