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A172573 as a simple table

na(n)
10
21
390291600
4729833528645228700
591880966659006902855367890000
6113498154592670786286712327731832894830000
7972197559210817377231037831422299544032898553608000000

[0,1,90291600,729833528645228700,
 91880966659006902855367890000,
 113498154592670786286712327731832894830000,
 97219755921081737723103783142229954403289855360800\
 0000]