"Half-Catalan numbers": a(n) = Sum_{k=1 ... floor(n/2)} a(k)a(n-k) with a(1) = 1.
1, 1, 1, 2, 3, 6, 11, 24, 47, 103, 214, 481, 1030, 2337, 5131, 11813, 26329, 60958
6 seqfan posts
Wed Dec 21 00:18:28 CET 2011 [seqfan] Re: Generating function for A000992
Tue Dec 20 22:50:55 CET 2011 [seqfan] Re: Generating function for A000992
Tue Dec 20 22:01:52 CET 2011 [seqfan] Re: Generating function for A000992
Tue Dec 20 17:09:22 CET 2011 [seqfan] Generating function for A000992
Sun Mar 22 19:35:59 CET 2009 [seqfan] Re: A158415
Sun Mar 22 17:49:39 CET 2009 [seqfan] Re: A158415
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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