A047693
formatted as a simple table:
n
a(n)
1
0
2
0
3
1
4
1
5
2
6
3
7
7
8
21
9
49
10
166
11
549
[0,0,1,1,2,3,7,21,49,166,549]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 29 12:46 EST 2009. Contains 167659 sequences.
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