A143533
formatted as a simple table:
n
a(n)
0
0
1
1
2
2
3
4
4
18
5
40
6
162
7
526
8
1708
9
4838
10
13522
[0,1,2,4,18,40,162,526,1708,4838,13522]
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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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