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Polycyclic aromatic hydrocarbons (for precise definition see He and He, 1986).
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%I #12 Feb 16 2023 16:11:58

%S 1,1,2,6,15,51,190,765,3226,14131,63007,285772,995837,6061703

%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, A256982.

%K nonn,more

%O 1,3

%A _N. J. A. Sloane_, Feb 09 2019

%E a(10)-a(14) from Trinajstić et al. (Table 4.6, the number of Kekuléan polyhexes with h hexagons) added by _Andrey Zabolotskiy_, Feb 08 2023