A018803
formatted as a simple table:
n
a(n)
1
2
2
14
3
276
4
10980
5
781712
6
58339148
7
3066831440
[2,14,276,10980,781712,58339148,3066831440]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 1 13:27 EST 2009. Contains 167806 sequences.
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