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A227446
as a simple table
n
a(n)
1
0
2
1
3
3
4
13
5
39
6
539
7
2631
8
4283
9
13595
[0,1,3,13,39,539,2631,4283,13595]
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Last modified April 25 12:33 EDT 2024. Contains 371969 sequences. (Running on oeis4.)