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A323793
as a simple table
n
a(n)
0
1
1
1
2
5
3
15
4
65
5
240
6
1090
7
4845
[1,1,5,15,65,240,1090,4845]
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Last modified August 9 18:14 EDT 2024. Contains 375044 sequences. (Running on oeis4.)