A111425 - OEIS

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A111425 as a simple table

n	a(n)
0	0
1	0
2	0
3	1
4	1
5	4
6	24
7	504
8	66012
9	181997601
10	65720971788709
11	65431225571591367370292
12	23523635785731871586396890786299881280
13	8419860898569880503664421048610377961601349941695806840602396

[0,0,0,1,1,4,24,504,66012,181997601, 65720971788709,65431225571591367370292, 23523635785731871586396890786299881280, 84198608985698805036644210486103779616013499416958\ 06840602396]