%I #8 Oct 23 2019 22:08:03
%S 1,3,12,57,264,1261,6141,30276,150853,758145,3836896,19534086,
%T 99957904,513756551,2650822585,13724435509,71275344341,371177285715,
%U 1937791196448,10139548682524,53165765660928,279301910804937
%N a(n) = Sum_{k=0..n} T(n,k) * T(n,n+k), with T given by A027113.
%K nonn
%O 0,2
%A _Clark Kimberling_