%I #4 Mar 30 2012 18:56:11
%S 1,6,30,144,687,3296,15972,78294,388320,1947910,9875566,50560246,
%T 261177401,1360112590,7134802722,37673830960,200106632766,
%U 1068539351340,5733226876876,30894846668416,167137498306038,907416216735816
%N T(2n+1,n+2), T given by A026780.
%K nonn
%O 1,2
%A _Clark Kimberling_