%I #3 Mar 30 2012 16:50:52
%S 1,3,13,62,287,1352,6256,28737,130665
%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 4,2
%A _N. J. A. Sloane_, Sep 18 2008