A090870
formatted as a simple table:
n
a(n)
1
2
2
3
3
7
4
69
5
1642
6
12073
7
12073
8
6496152
[2,3,7,69,1642,12073,12073,6496152]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.
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