A074435
formatted as a simple table:
n
a(n)
1
0
2
0
3
3
4
8
5
42
6
214
7
1008
8
5094
9
29160
10
169987
[0,0,3,8,42,214,1008,5094,29160,169987]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 27 22:38 EST 2009. Contains 167602 sequences.
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