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A291967
as a simple table
n
a(n)
0
1
1
1
2
3
3
21
4
651
5
657653
6
210065930571
[1,1,3,21,651,657653,210065930571]
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Last modified May 1 22:42 EDT 2024. Contains 372178 sequences. (Running on oeis4.)
