A172627 - OEIS

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A172627 as a simple table

n	a(n)
1	0
2	0
3	1
4	282
5	628080
6	3680774301
7	49846153939785
8	1418365816378741440
9	78459796857685317493440
10	7915651642356094020231766800
11	1381222121393845839281152868103600

[0,0,1,282,628080,3680774301,49846153939785, 1418365816378741440,78459796857685317493440, 7915651642356094020231766800, 1381222121393845839281152868103600]