A121096
formatted as a simple table:
n
a(n)
0
1
1
1
2
4
3
11
4
41
5
138
6
502
7
1747
8
6165
9
21420
[1,1,4,11,41,138,502,1747,6165,21420]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 6 22:55 EST 2009. Contains 170429 sequences.
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