A135810 - OEIS

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A135810 as a simple table

n	a(n)
0	1
1	0
2	15
3	1250
4	326685
5	205713924
6	267499350955
7	643364455632870
8	2637753876195952185
9	17316358344270678304520
10	173227930768100416550798151
11	2536860701329458663625695526890

[1,0,15,1250,326685,205713924,267499350955, 643364455632870,2637753876195952185, 17316358344270678304520, 173227930768100416550798151, 2536860701329458663625695526890]