A018760
formatted as a simple table:
n
a(n)
1
1
2
3
3
7
4
21
5
47
6
141
7
329
8
987
[1,3,7,21,47,141,329,987]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 10 12:37 EST 2009. Contains 170569 sequences.
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