A129876
formatted as a simple table:
n
a(n)
1
2
2
4
3
14
4
52
5
210
6
888
7
3886
8
17448
[2,4,14,52,210,888,3886,17448]
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N. J. A. Sloane
(
njas@research.att.com
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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.
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