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A177293 as a simple table

n a(n)
0 1
1 1
2 20
3 1680
4 369600
5 37850400
6 2626916040
7 171548183912
8 12520880883034
9 920942694050320
10 65368388837752640

[1,1,20,1680,369600,37850400,2626916040,
 171548183912,12520880883034,920942694050320,
 65368388837752640]

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Last modified May 3 11:14 EDT 2024. Contains 372207 sequences. (Running on oeis4.)