A006783
formatted as a simple table:
n
a(n)
1
3
2
22
3
201
4
2160
5
24680
6
285384
7
3278484
8
37154172
[3,22,201,2160,24680,285384,3278484,37154172]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 2 11:54 EST 2009. Contains 167921 sequences.
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