A059870
formatted as a simple table:
n
a(n)
1
2
2
3
3
5
4
6
5
7
6
8
7
10
8
11
9
15
10
17
11
18
12
20
[2,3,5,6,7,8,10,11,15,17,18,20]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 3 22:15 EST 2009. Contains 170310 sequences.
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