A020496
formatted as a simple table:
n
a(n)
4
1
5
4
6
19
7
55
8
181
9
461
[1,4,19,55,181,461]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 15 00:47 EST 2009. Contains 170825 sequences.
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