A005801 - OEIS

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A005801 as a simple table

n	a(n)
0	0
1	30
2	217800
3	16294301520
4	6544151202877440
5	9764950519194817858560
6	42762698240957239228617722880
7	466476501707480855594001261422438400
8	11235366943887873286558941529247982529413120

[0,30,217800,16294301520,6544151202877440, 9764950519194817858560, 42762698240957239228617722880, 466476501707480855594001261422438400, 11235366943887873286558941529247982529413120]