A078431
formatted as a simple table:
n
a(n)
1
0
2
1
3
1
4
3
5
3
6
20
7
126
8
694
9
2874
10
25059
[0,1,1,3,3,20,126,694,2874,25059]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 15 00:47 EST 2009. Contains 170825 sequences.
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