A058130
formatted as a simple table:
n
a(n)
1
1
2
2
3
4
4
19
5
128
6
1344
7
20997
8
1479686
[1,2,4,19,128,1344,20997,1479686]
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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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