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A323929 Polycyclic aromatic hydrocarbons (for precise definition see He and He, 1986). 1
0, 0, 1, 1, 7, 30, 141, 671, 3284, 15998, 78505, 385766, 2214783, 9382168 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,5
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
Sequence in context: A210100 A297080 A256981 * A180786 A343755 A026653
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Feb 09 2019
EXTENSIONS
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
STATUS
approved

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Last modified March 28 13:25 EDT 2024. Contains 371254 sequences. (Running on oeis4.)