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%I #4 Mar 30 2012 18:56:51
%S 1,1,3,19,99,624,3684,23379,144877,927084,5882776,37925111,243908212,
%T 1582102118,10261788552,66893579077,436419943039,2856304168480,
%U 18714325924703,122881818022921,807744978199879,5318012331907328
%N T(2n,n), array T given by A047020.
%K nonn
%O 1,3
%A _Clark Kimberling_