A006712
formatted as a simple table:
n
a(n)
2
6
3
480
4
197820
5
154103040
6
215643443400
[6,480,197820,154103040,215643443400]
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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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