A031872
formatted as a simple table:
n
a(n)
1
1
2
2
3
6
4
13
5
26
6
28
7
36
8
42
9
45
[1,2,6,13,26,28,36,42,45]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 5 20:25 EST 2009. Contains 170428 sequences.
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