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A323789
as a simple table
n
a(n)
0
1
1
1
2
4
3
15
4
64
5
269
6
1310
7
6460
[1,1,4,15,64,269,1310,6460]
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Last modified June 29 23:48 EDT 2024. Contains 373856 sequences. (Running on oeis4.)