A006821
formatted as a simple table:
n
a(n)
3
1
4
3
5
60
6
7848
7
3459383
8
2585136675
9
2807105250897
[1,3,60,7848,3459383,2585136675,2807105250897]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 11 12:57 EST 2009. Contains 170656 sequences.
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