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A218312
as a simple table
n
a(n)
1
1
2
15
3
511
4
65089
5
33296833
6
68184176641
7
558512367132769
8
18299400300282885215
[1,15,511,65089,33296833,68184176641, 558512367132769,18299400300282885215]
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Last modified April 25 11:39 EDT 2024. Contains 371969 sequences. (Running on oeis4.)