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A177474
as a simple table
n
a(n)
1
1
2
2
3
6
4
20
5
83
6
411
7
2290
8
14588
9
104448
[1,2,6,20,83,411,2290,14588,104448]
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Last modified April 25 07:07 EDT 2024. Contains 371964 sequences. (Running on oeis4.)