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A000992
a(n)= Sum_{k=1 ... floor(n/2)} a(k)a(n-k) with a(1) = 1.
(Formerly M0793 N0300)
+0
13
1, 1, 1, 2, 3, 6, 11, 24, 47, 103, 214, 481, 1030, 2337, 5131, 11813, 26329, 60958, 137821, 321690, 734428, 1721998, 3966556, 9352353, 21683445, 51296030, 119663812, 284198136, 666132304, 1586230523, 3734594241, 8919845275
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.
AT&T Labs Research
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