A012461 - OEIS

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A012461 as a simple table

n	a(n)
0	0
1	2
2	-16
3	488
4	-30336
5	3061152
6	-450481920
7	90676698240
8	-23889578496000
9	7972943138664960
10	-3286129765438771200
11	1638857583672607549440
12	-972524875970827007262720
13	677113960144029088030433280

[0,2,-16,488,-30336,3061152,-450481920, 90676698240,-23889578496000,7972943138664960, -3286129765438771200,1638857583672607549440, -972524875970827007262720, 677113960144029088030433280]