%I #5 Mar 30 2012 18:56:54

%S 1,1,2,4,6,12,24,42,84,168,312,624,1248,2388,4776,9552,18576,37152,

%T 74304,145884,291768,583536,1152456,2304912,4609824,9138888,18277776,

%U 36555552,72654552,145309104,290618208,578607912

%N (1/2)*Sum{T(n,i): i=0,1,...,n}, where T is given by A048113.

%K nonn

%O 3,3

%A _Clark Kimberling_