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A269890
as a simple table
n
a(n)
1
2
2
8
3
33
4
193
5
953
6
7440
7
55200
8
627187
9
7510549
[2,8,33,193,953,7440,55200,627187,7510549]
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Last modified May 9 18:00 EDT 2024. Contains 372354 sequences. (Running on oeis4.)