A052452
formatted as a simple table:
n
a(n)
1
0
2
0
3
0
4
1
5
4
6
30
7
301
8
4985
9
142276
10
7269487
[0,0,0,1,4,30,301,4985,142276,7269487]
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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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