A012196 - OEIS

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A012196 as a simple table

n	a(n)
0	1
1	-3
2	57
3	-2419
4	198801
5	-25335395
6	4816346441
7	-1245230547347
8	427817295559329
9	-186336568593526211
10	101138532707457916121
11	-66575531182102753799603
12	52444802490227536269748273

[1,-3,57,-2419,198801,-25335395,4816346441, -1245230547347,427817295559329, -186336568593526211,101138532707457916121, -66575531182102753799603, 52444802490227536269748273]