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A253950
as a simple table
n
a(n)
1
1
2
1
3
2
4
8
5
44
6
308
7
2641
8
27120
9
332507
10
5035455
[1,1,2,8,44,308,2641,27120,332507,5035455]
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Last modified April 23 08:33 EDT 2024. Contains 371905 sequences. (Running on oeis4.)