A012096 - OEIS

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A012096 as a simple table

n	a(n)
0	1
1	1
2	-3
3	69
4	-2503
5	177481
6	-18539595
7	2813939725
8	-573509386895
9	152349815266705
10	-50966873710838675
11	20993994712780457685
12	-10435138367654204994135
13	6159973489221376775016665

[1,1,-3,69,-2503,177481,-18539595,2813939725, -573509386895,152349815266705,-50966873710838675, 20993994712780457685,-10435138367654204994135, 6159973489221376775016665]