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A156871
as a simple table
n
a(n)
1
1
2
2
3
5
4
20
5
170
6
3650
7
298132
8
159632503
[1,2,5,20,170,3650,298132,159632503]
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Last modified April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)
