A159827
formatted as a simple table:
n
a(n)
1
1
2
0
3
0
4
0
5
0
6
12
7
288
8
4032
9
47904
10
398736
11
2668464
[1,0,0,0,0,12,288,4032,47904,398736,2668464]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 16 17:18 EST 2009. Contains 170825 sequences.
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