A117537
formatted as a simple table:
n
a(n)
0
2
1
3
2
5
3
7
4
12
5
19
6
31
7
46
8
53
9
72
10
270
11
311
12
954
13
1178
14
1308
15
1395
16
1578
17
3395
18
4190
[2,3,5,7,12,19,31,46,53,72,270,311,954,1178,1308, 1395,1578,3395,4190]
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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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