A137409
formatted as a simple table:
n
a(n)
1
1
2
2
3
3
4
4
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
14
13
15
14
16
15
18
16
19
17
20
18
21
19
22
20
23
21
24
22
26
[1,2,3,4,6,7,8,9,10,11,12,14,15,16,18,19,20,21,22, 23,24,26]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 2 11:54 EST 2009. Contains 167921 sequences.
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