%I

%S 1,9,40,240,915,5103,18704,101952,368490,1990890,7154928,38514528,

%T 138086403,742202055,2658662560,14283407616,51156225342,274842096462,

%U 984532674800,5291030979360,18960255044654,101937273452454,365451691152864

%N a(n) = T(2n,n-2), T given by A026648.

%K nonn

%O 2,2

%A _Clark Kimberling_