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A139771
as a simple table
n
a(n)
1
1
2
2
3
6
4
60
5
20160
6
23543886643200
7
41101884684637603112076605638990269409595309948928000000
[1,2,6,60,20160,23543886643200, 41101884684637603112076605638990269409595309948928\ 000000]
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Last modified May 3 17:26 EDT 2024. Contains 372222 sequences. (Running on oeis4.)