A012373 - OEIS

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A012373 as a simple table

n	a(n)
0	1
1	0
2	12
3	120
4	12432
5	680640
6	102772032
7	14295765120
8	3342487648512
9	854980598876160
10	298224965387983872
11	119257847834622351360
12	59074248780911484506112
13	33687669462151354934968320

[1,0,12,120,12432,680640,102772032,14295765120, 3342487648512,854980598876160,298224965387983872, 119257847834622351360,59074248780911484506112, 33687669462151354934968320]