A012342 - OEIS

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A012342 as a simple table

n	a(n)
0	0
1	2
2	8
3	368
4	18048
5	1827072
6	253363200
7	50403563520
8	13158813696000
9	4414765984972800
10	1841972633056051200
11	936689336904269168640
12	569861032837432328847360
13	408713488929007199437455360

[0,2,8,368,18048,1827072,253363200,50403563520, 13158813696000,4414765984972800, 1841972633056051200,936689336904269168640, 569861032837432328847360, 408713488929007199437455360]