A002090
formatted as a simple table:
n
a(n)
1
3
2
4
3
6
4
11
5
45
6
906
7
409182
8
83762797735
[3,4,6,11,45,906,409182,83762797735]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 29 12:46 EST 2009. Contains 167659 sequences.
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