A012074 - OEIS

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A012074 as a simple table

n	a(n)
0	1
1	-1
2	-3
3	-69
4	-3335
5	-289801
6	-39612939
7	-7845054541
8	-2125704833551
9	-755532171928081
10	-341044077485199379
11	-190581499954444336725
12	-129146418452087275163415
13	-104328785204254369631603225

[1,-1,-3,-69,-3335,-289801,-39612939,-7845054541, -2125704833551,-755532171928081, -341044077485199379,-190581499954444336725, -129146418452087275163415, -104328785204254369631603225]