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A197857
as a simple table
n
a(n)
1
1
2
5
3
20
4
176
5
3305
6
105716
7
6566238
8
830613754
9
204947432021
[1,5,20,176,3305,105716,6566238,830613754, 204947432021]
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Last modified April 20 03:59 EDT 2024. Contains 371798 sequences. (Running on oeis4.)
