%I

%S 1,3,7,15,32,66,139,285,599,1227,2577,5277,11075,22671,47543,97287,

%T 203860,417006,873175,1785513,3736210,7637604,15972143,32641221,

%U 68224004,139389570,291199307,594818781,1242097912,2536656174

%N Sum{T(i,j)}, 0<=i<=n, 0<=j<=n, T given by A026736.

%K nonn

%O 0,2

%A _Clark Kimberling_