A147800
formatted as a simple table:
n
a(n)
1
2
2
6
3
22
4
42
5
222
6
366
7
2046
8
13962
9
10626
10
79926
11
293262
[2,6,22,42,222,366,2046,13962,10626,79926,293262]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 17 23:40 EST 2009. Contains 171025 sequences.
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