A013581
formatted as a simple table:
n
a(n)
1
1
2
3
3
9
4
15
5
33
6
75
7
90
8
105
9
165
10
213
[1,3,9,15,33,75,90,105,165,213]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 27 22:38 EST 2009. Contains 167602 sequences.
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