A223264 - OEIS

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A223264 as a simple table

n	a(n)
1	1
2	48
3	20992
4	63438848
5	1771674009600
6	389343801904201728
7	761838097494483172065280
8	12136917084120610801062514786304
9	1696402284763369899693403606733469777920

[1,48,20992,63438848,1771674009600, 389343801904201728,761838097494483172065280, 12136917084120610801062514786304, 1696402284763369899693403606733469777920]