%I

%S 1,2,9,58,333,1907,10552,57019,300833

%N Counts of Kekulean pericondensed planar benzenoid hydrocarbons (see reference for precise definition).

%D Jerry Ray Dias, Isomer enumeration of practical benzenoids, J. Math. Chem., 44 (2008), 711-724.

%K nonn

%O 5,2

%A _N. J. A. Sloane_, Sep 18 2008