A004131
formatted as a simple table:
n
a(n)
2
1
3
3
4
6
5
9
6
13
7
17
8
24
9
30
10
36
[1,3,6,9,13,17,24,30,36]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 15 00:47 EST 2009. Contains 170825 sequences.
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