A090539
formatted as a simple table:
n
a(n)
1
1
2
4
3
11
4
28
5
62
6
137
7
278
8
561
9
1080
10
2051
11
3778
12
6885
13
12255
14
21589
15
37409
16
64160
17
108612
[1,4,11,28,62,137,278,561,1080,2051,3778,6885, 12255,21589,37409,64160,108612]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 6 11:04 EST 2009. Contains 170427 sequences.
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