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A168481 as a simple table

n a(n)
0 1
1 4
2 56
3 2432
4 377600
5 222691328
6 513752956928
7 4690384533848064
8 170085542794237050880
9 24520078828632712041988096
10 14055876186039467842015007342592 

[1,4,56,2432,377600,222691328,513752956928,
 4690384533848064,170085542794237050880,
 24520078828632712041988096,
 14055876186039467842015007342592]

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Last modified April 1 12:55 EDT 2023. Contains 361691 sequences. (Running on oeis4.)