A061221
formatted as a simple table:
n
a(n)
1
0
2
0
3
0
4
0
5
1440
6
5328
7
47952
8
72576
9
81792
[0,0,0,0,1440,5328,47952,72576,81792]
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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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