%I

%S 1,2,3,5,9,18,36,69,134,263,526,1052,2085,4143,8250,16500,33000,65851,

%T 131484,262668,525336,1050672,2100045,4198157,8393603,16787206,

%U 33574412,67136750,134255332,268484858,536969716,1073939432,2147761687

%N Sum{T(i,n-i): i=0,1,...,n}, array T as in A047120.

%K nonn

%O 0,2

%A _Clark Kimberling_