A117541
formatted as a simple table:
n
a(n)
1
1
2
2
3
6
4
9
5
56
6
23
7
399
8
442
9
2220
10
2386
11
71577
12
22001
13
1179483
14
1156519
15
4975079
[1,2,6,9,56,23,399,442,2220,2386,71577,22001, 1179483,1156519,4975079]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 8 08:31 EST 2009. Contains 170430 sequences.
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