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A001289
as a simple table
n
a(n)
1
1
2
2
3
3
4
8
5
48
6
150357
7
63379147320777408548
[1,2,3,8,48,150357,63379147320777408548]
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Last modified March 29 04:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)