A172898 - OEIS

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A172898 as a simple table

n	a(n)
1	0
2	0
3	231
4	3416992
5	411376189470
6	292963407932973960
7	1019341412751580730961408
8	14800896794108577720470005943168
9	787822511525554259096702212708356345684

[0,0,231,3416992,411376189470,292963407932973960, 1019341412751580730961408, 14800896794108577720470005943168, 787822511525554259096702212708356345684]