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%I #2 Mar 31 2012 12:38:17
%S 0,1,4,9,17,27,39,53,69,88,109,132,157,184,213,245,279,315,353,394,
%T 436,481,528,577,628,682,738,795,855,918,982,1049,1117,1188,1262,1337,
%U 1414,1494,1576,1660,1746,1835,1925,2018,2113,2210,2310,2411,2515,2621,2729
%N a(n)=Floor[(n^2)/Catalan].
%t a[n_]:=Floor[(n^2)/Catalan];
%K nonn
%O 1,3
%A _Vladimir Joseph Stephan Orlovsky_, Dec 12 2008