A018960
formatted as a simple table:
n
a(n)
2
2
3
9
4
43
5
185
6
1068
7
5908
8
33711
9
201908
10
1252537
[2,9,43,185,1068,5908,33711,201908,1252537]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 8 08:31 EST 2009. Contains 170430 sequences.
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