A009103 - OEIS

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A009103 as a simple table

n	a(n)
0	1
1	0
2	0
3	-3
4	11
5	-70
6	534
7	-4725
8	47753
9	-542988
10	6859084
11	-95298995
12	1444301715
13	-23711336922
14	419190167434
15	-7939747234965
16	160403009819921
17	-3442962495033400
18	78246246638467512
19	-1877007578925506787

[1,0,0,-3,11,-70,534,-4725,47753,-542988,6859084, -95298995,1444301715,-23711336922,419190167434, -7939747234965,160403009819921,-3442962495033400, 78246246638467512,-1877007578925506787]