A121231
formatted as a simple table:
n
a(n)
1
2
2
11
3
172
4
6327
5
474286
6
67147431
[2,11,172,6327,474286,67147431]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 30 13:13 EST 2009. Contains 167758 sequences.
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