A068260
formatted as a simple table:
n
a(n)
1
1
2
657
3
28398249
4
80756726956857
5
15108689909693560486761
[1,657,28398249,80756726956857, 15108689909693560486761]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 5 23:38 EST 2009. Contains 170428 sequences.
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