A211041 - OEIS

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A211041 as a simple table

n	a(n)
1	0
2	1
3	0
4	6
5	8
6	118
7	880
8	14400
9	318220
10	10446298
11	531060152
12	39577654480
13	4465022457276
14	757302604610482
15	191605833481050984

[0,1,0,6,8,118,880,14400,318220,10446298, 531060152,39577654480,4465022457276, 757302604610482,191605833481050984]