A012988 - OEIS

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A012988 as a simple table

n	a(n)
0	2
1	-17
2	881
3	-111919
4	26533505
5	-10100912631
6	5639610453681
7	-4341268802719599
8	4406801928941004417
9	-5703476313460410444519
10	9166802819086051420527153
11	-17912428427903720892882856479

[2,-17,881,-111919,26533505,-10100912631, 5639610453681,-4341268802719599, 4406801928941004417,-5703476313460410444519, 9166802819086051420527153, -17912428427903720892882856479]