A002243
formatted as a simple table:
n
a(n)
1
1
2
2
3
3
4
5
5
6
6
8
7
12
8
15
9
20
10
23
11
33
12
78
[1,2,3,5,6,8,12,15,20,23,33,78]
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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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