A007187
formatted as a simple table:
n
a(n)
2
1
3
3
4
6
5
9
6
15
7
20
8
26
9
34
10
41
[1,3,6,9,15,20,26,34,41]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 17 13:29 EST 2009. Contains 170826 sequences.
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