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%I #3 Mar 30 2012 16:50:52
%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
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