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A089871
as a simple table
n
a(n)
0
1
1
1
2
2
3
2
4
2
5
10
6
40
7
240
8
5040
9
388080
10
5045040
11
94643905622666400
[1,1,2,2,2,10,40,240,5040,388080,5045040, 94643905622666400]
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Last modified September 1 03:07 EDT 2024. Contains 375575 sequences. (Running on oeis4.)