A012475 - OEIS

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A012475 as a simple table

n	a(n)
0	1
1	-6
2	120
3	-7056
4	758400
5	-130918656
6	33173038080
7	-11587651270656
8	5337660866396160
9	-3134856182239789056
10	2286367634020679024640
11	-2027369655249396662009856
12	2147914157998443571728875520

[1,-6,120,-7056,758400,-130918656,33173038080, -11587651270656,5337660866396160, -3134856182239789056,2286367634020679024640, -2027369655249396662009856, 2147914157998443571728875520]