A001625
formatted as a simple table:
n
a(n)
2
2
3
4
4
60
5
1276
6
41888
7
1916064
8
116522048
9
9069595840
10
878460379392
[2,4,60,1276,41888,1916064,116522048,9069595840, 878460379392]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 7 08:40 EST 2009. Contains 170430 sequences.
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