A012414 - OEIS

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A012414 as a simple table

n	a(n)
0	0
1	1
2	2
3	0
4	-16
5	-52
6	200
7	3752
8	18496
9	-190384
10	-4797152
11	-28063552
12	661457920
13	17348360768
14	74504846208
15	-4999196993152
16	-124352680593408
17	-83620707815168
18	65968266617811456
19	1541961961341134848

[0,1,2,0,-16,-52,200,3752,18496,-190384,-4797152, -28063552,661457920,17348360768,74504846208, -4999196993152,-124352680593408,-83620707815168, 65968266617811456,1541961961341134848]