A038728
formatted as a simple table:
n
a(n)
1
0
2
0
3
0
4
0
5
2240
6
35840
7
433040
8
4862560
9
51759280
[0,0,0,0,2240,35840,433040,4862560,51759280]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 18 21:37 EST 2009. Contains 171024 sequences.
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