A001186
formatted as a simple table:
n
a(n)
2
1
3
2
4
5
5
17
6
80
7
474
8
3841
9
39635
10
495991
11
7170657
[1,2,5,17,80,474,3841,39635,495991,7170657]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 30 13:13 EST 2009. Contains 167758 sequences.
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