A074422
formatted as a simple table:
n
a(n)
1
1
2
0
3
0
4
4
5
25
6
165
7
1157
8
6552
9
33045
10
167928
[1,0,0,4,25,165,1157,6552,33045,167928]
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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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