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%I #8 Jul 26 2019 06:17:08
%S 1,4,50,805,15218,326053,7736092,199806100
%N Kekulé numbers for certain benzenoids (see the Cyvin-Gutman book for details).
%H Cyvin S.J., Gutman I. (1988) <a href="https://doi.org/10.1007/978-3-662-00892-8_11">Classes of Basic Benzenoids (III)</a>. In: Kekulé Structures in Benzenoid Hydrocarbons. Lecture Notes in Chemistry, vol 46. Springer, Berlin, Heidelberg (see p. 188)
%K nonn
%O 0,2
%A _N. J. A. Sloane_, Oct 10 2006