A018953
formatted as a simple table:
n
a(n)
2
2
3
6
4
34
5
217
6
1092
7
6616
8
39640
9
254593
10
1678272
[2,6,34,217,1092,6616,39640,254593,1678272]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 19 12:50 EST 2009. Contains 171053 sequences.
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