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A006993
as a simple table
n
a(n)
1
1
2
10
3
20
4
120
5
440
6
3200
7
20460
8
116600
9
612700
10
3628800
[1,10,20,120,440,3200,20460,116600,612700,3628800]
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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)
