A005020
formatted as a simple table:
n
a(n)
1
1
2
2
3
168
4
32738
5
20825760
6
47942081642
[1,2,168,32738,20825760,47942081642]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 20 13:54 EST 2009. Contains 171081 sequences.
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