A056322 - OEIS

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A056322 as a simple table

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	360
7	7560
8	95760
9	952560
10	8217720
11	64615680
12	476514720
13	3355679880
14	22837094280
15	151449674040
16	984573560880
17	6302070915840
18	39847410373680
19	249509384858160
20	1550188402338240
21	9570844671217200

[0,0,0,0,0,360,7560,95760,952560,8217720,64615680, 476514720,3355679880,22837094280,151449674040, 984573560880,6302070915840,39847410373680, 249509384858160,1550188402338240,9570844671217200]