A056012
formatted as a simple table:
n
a(n)
1
1
2
2
3
4
4
6
5
90
6
408
7
586
8
2200352
9
11524640
[1,2,4,6,90,408,586,2200352,11524640]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 29 12:46 EST 2009. Contains 167659 sequences.
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