A038140
Number of planar polyhexes with n cells and a single hole of size at least 2.
Original entry on oeis.org
0, 0, 0, 0, 0, 0, 0, 1, 5, 43, 283, 1954, 12363, 76283, 453946, 2641506
Offset: 1
- Sven J. Cyvin, Jon Brunvoll, Björg N. Cyvin, John L. Bergan, and E. Brendsdal, The simplest coronoids: hollow hexagons, Struct. Chem., 2 (1991), 555-566.
- J. V. Knop, W. R. Mueller, K. Szymanski, and N. Trinajstic, Use of small computers for large computations: enumeration of polyhex hydrocarbons, J. Chem. Inf. Comput. Sci., 30 (1990), 159-160.
A323851
Polycyclic aromatic hydrocarbons (for precise definition see He and He, 1986).
Original entry on oeis.org
0, 0, 0, 1, 2, 12, 51, 229, 969, 4098, 16867, 68925, 278907, 1123302, 4507640
Offset: 1
- 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.
a(13)-a(15) from Trinajstić et al. (Table 4.2, the number of cata-condensed benzenoids with h hexagons, branched) added by
Andrey Zabolotskiy, Feb 08 2023
A323924
Polycyclic aromatic hydrocarbons (for precise definition see He and He, 1986).
Original entry on oeis.org
0, 0, 0, 1, 3, 6, 22, 58
Offset: 1
A323929
Polycyclic aromatic hydrocarbons (for precise definition see He and He, 1986).
Original entry on oeis.org
0, 0, 1, 1, 7, 30, 141, 671, 3284, 15998, 78505, 385766, 2214783, 9382168
Offset: 1
- 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.
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
A323925
Polycyclic aromatic hydrocarbons (for precise definition see He and He, 1986).
Original entry on oeis.org
0, 0, 0, 0, 2, 12, 66, 331, 1678
Offset: 1
A323926
Polycyclic aromatic hydrocarbons (for precise definition see He and He, 1986).
Original entry on oeis.org
1, 1, 2, 6, 15, 51, 190, 765, 3226, 14131, 63007, 285772, 995837, 6061703
Offset: 1
- 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.
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
A323927
Polycyclic aromatic hydrocarbons (for precise definition see He and He, 1986).
Original entry on oeis.org
0, 0, 1, 0, 1, 3, 9, 27, 119
Offset: 1
A323928
Polycyclic aromatic hydrocarbons (for precise definition see He and He, 1986).
Original entry on oeis.org
0, 0, 0, 1, 6, 27, 132, 644, 3165
Offset: 1
Showing 1-8 of 8 results.