%I #9 Mar 30 2012 18:58:11
%S 1,10,280,13860,1009008,98017920,11972188800,1766895530400,
%T 306261891936000,61040779261862400,13761921142674432000,
%U 3464298995338621440000,963455812901426718720000,293441113300834537758720000
%N (3n)!/[3n*n!*(n+1)!]
%t Table[(3n)!/(3n*n!*(n+1)!),{n,1,14}]
%K nonn
%O 1,2
%A _Clark Kimberling_, Feb 01 2012