A323923 Branched catafusenes (cata-condensed benzenoids) without helicenes, symmetry C_s.
0, 1, 7, 44, 206, 937, 3997, 16719, 68520, 278239, 1121632, 4504875
Offset: 4
Links
- A. T. Balaban, J. Brunvoll, B. N. Cyvin, and S. J. Cyvin, Enumeration of branched catacondensed benzenoid hydrocarbons and their numbers of Kekulé structures, Tetrahedron 44(1) (1988), 221-228. See Table 2.
- Björg N. Cyvin, Jon Brunvoll and Sven J. Cyvin, Enumeration of benzenoid systems and other polyhexes, p. 65-180 in: I. Gutman (ed.), Advances in the Theory of Benzenoid Hydrocarbons II, Springer, 1992.
Crossrefs
For any symmetry, see A323851.
Extensions
Name clarified, a(13)-a(15) from Cyvin, Brunvoll & Cyvin (Table 17) added by Andrey Zabolotskiy, Feb 16 2023