A002670
formatted as a simple table:
n
a(n)
1
1
2
2
3
12
4
72
5
240
6
2400
7
907200
8
4233600
9
25401600
10
1371686400
[1,2,12,72,240,2400,907200,4233600,25401600, 1371686400]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 27 22:38 EST 2009. Contains 167602 sequences.
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