A032057 - OEIS

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A032057 as a simple table

n	a(n)
1	2
2	2
3	12
4	174
5	2880
6	67560
7	1905960
8	63251370
9	2418101280
10	104707709820
11	5063563002960
12	270496771471080
13	15820958657223720
14	1005528154974983640
15	69006386355388962480
16	5085661679602382028150

[2,2,12,174,2880,67560,1905960,63251370, 2418101280,104707709820,5063563002960, 270496771471080,15820958657223720, 1005528154974983640,69006386355388962480, 5085661679602382028150]