A002786
formatted as a simple table:
n
a(n)
1
1
2
2
3
5
4
19
5
132
6
3107
7
623615
[1,2,5,19,132,3107,623615]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 11 12:57 EST 2009. Contains 170656 sequences.
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