A012381 - OEIS

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A012381 as a simple table

n	a(n)
0	2
1	12
2	70
3	-4200
4	-347702
5	8053540
6	8370022414
7	1537444327216
8	-75026900539758
9	-163917764618098628
10	-46635653602838486826
11	19561200248822504710856
12	28903055462807082203920986

[2,12,70,-4200,-347702,8053540,8370022414, 1537444327216,-75026900539758,-163917764618098628, -46635653602838486826,19561200248822504710856, 28903055462807082203920986]