A077392
formatted as a simple table:
n
a(n)
1
0
2
0
3
0
4
0
5
1
6
5
7
51
8
842
9
27107
10
1724440
[0,0,0,0,1,5,51,842,27107,1724440]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 6 22:55 EST 2009. Contains 170429 sequences.
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