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%I #12 Feb 16 2023 16:12:17
%S 0,0,1,1,7,30,141,671,3284,15998,78505,385766,2214783,9382168
%N Polycyclic aromatic hydrocarbons (for precise definition see He and He, 1986).
%D N. Trinajstić, S. Nikolić, J. V. Knop, W. R. Müller and K. Szymanski, Computational Chemical Graph Theory: Characterization, Enumeration, and Generation of Chemical Structures by Computer Methods, Ellis Horwood, 1991.
%H Wenchen He and Wenjie He, <a href="https://doi.org/10.1016/S0040-4020(01)82078-0">Generation and enumeration of planar polycyclic aromatic hydrocarbons</a>, Tetrahedron 42.19 (1986): 5291-5299. See Table 1.
%Y Cf. A003104, A323923-A323930, A256981.
%K nonn,more
%O 1,5
%A _N. J. A. Sloane_, Feb 09 2019
%E a(10)-a(14) from Trinajstić et al. (Table 4.11, the number of non-Kekuléan polyhexes with h hexagons) added by _Andrey Zabolotskiy_, Feb 08 2023