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A087315 as a simple table

n a(n)
0 1
1 4
2 72
3 21600
4 190512000
5 580909190400000
6 428616352408083840000000
7 859278392084450410309036800000000000
8 2097197194438629126172451944256706311040000000000000 

[1,4,72,21600,190512000,580909190400000,
 428616352408083840000000,
 859278392084450410309036800000000000,
 20971971944386291261724519442567063110400000000000\
 00]

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Last modified April 23 20:33 EDT 2024. Contains 371916 sequences. (Running on oeis4.)