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%I #6 Oct 09 2013 02:24:27
%S 0,6,84,780,5880,39060,238392,1369368,7516080,39819780,205079160,
%T 1032047016,5094629904,24743027400,118504436400,560749834800,
%U 2625519143520,12179090862180,56029885342200,255864364648200
%N (n+n^2+n^3)*(binomial(2*n,n)).
%p [seq ((n+n^2+n^3)*(binomial(2*n,n)),n=0..25)];
%Y Cf. A000984, A027444.
%K easy,nonn
%O 0,2
%A _Zerinvary Lajos_, May 31 2006