%I #5 Mar 30 2012 18:56:53
%S 1,1,5,31,151,917,5619,33627,210911,1326395,8366161,53441835,
%T 342477957,2203613164,14248253995,92379163952,600644552471,
%U 3915699367751,25579440322831,167423682425912,1097738520430457,7208383257398805
%N T(2n,n), array T as in A047110.
%K nonn
%O 0,3
%A _Clark Kimberling_. Definition revised Dec 08 2006