A227257 - OEIS

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A227257 as a simple table

n	a(n)
1	0
2	1
3	24
4	1760
5	411861
6	551247139
7	2883245852086
8	85948329517780776
9	11001968794030973784902
10	7462399462450938863305238264

[0,1,24,1760,411861,551247139,2883245852086, 85948329517780776,11001968794030973784902, 7462399462450938863305238264]