A012299 - OEIS

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A012299 as a simple table

n	a(n)
0	0
1	2
2	-8
3	-88
4	6592
5	-9568
6	-49063808
7	4426189952
8	1122968737792
9	-441081682390528
10	-23926396899780608
11	74405808039377364992
12	-16597462789247237931008
13	-19016633437725878038847488

[0,2,-8,-88,6592,-9568,-49063808,4426189952, 1122968737792,-441081682390528,-23926396899780608, 74405808039377364992,-16597462789247237931008, -19016633437725878038847488]