A003684
formatted as a simple table:
n
a(n)
1
4
2
8
3
22
4
84
5
402
6
1218
7
3572
8
8218
9
11804
[4,8,22,84,402,1218,3572,8218,11804]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 20 16:54 EST 2009. Contains 171081 sequences.
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