A022563
formatted as a simple table:
n
a(n)
1
0
2
0
3
1
4
3
5
8
6
32
7
126
8
619
9
3332
10
20910
11
157721
12
1590329
[0,0,1,3,8,32,126,619,3332,20910,157721,1590329]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 5 23:38 EST 2009. Contains 170428 sequences.
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