A156664
formatted as a simple table:
n
a(n)
0
1
1
2
2
6
3
16
4
42
5
108
6
274
7
688
8
1714
9
4244
10
10458
11
25672
12
62826
13
153372
[1,2,6,16,42,108,274,688,1714,4244,10458,25672, 62826,153372]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 20 00:58 EST 2009. Contains 171054 sequences.
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