A323926 Polycyclic aromatic hydrocarbons (for precise definition see He and He, 1986).

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

Offset: 1

Author

N. J. A. Sloane, Feb 09 2019

Keywords

• nonn
• more

References

• 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.

Links

• Wenchen He and Wenjie He, Generation and enumeration of planar polycyclic aromatic hydrocarbons, Tetrahedron 42.19 (1986): 5291-5299. See Table 1.

Crossrefs

Cf. A003104, A323923-A323930, A256982.

Extensions

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