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A120388
as a simple table
n
a(n)
1
2
2
4
3
20
4
173
5
2612
6
66900
7
2851540
8
201613875
[2,4,20,173,2612,66900,2851540,201613875]
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Last modified April 19 10:56 EDT 2024. Contains 371791 sequences. (Running on oeis4.)
