A127781
formatted as a simple table:
n
a(n)
1
1
2
3
3
7
4
23
5
29
6
157
7
907
8
8471621
9
261369371
[1,3,7,23,29,157,907,8471621,261369371]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 20 13:54 EST 2009. Contains 171081 sequences.
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