A323932 Unbranched catafusenes, unsymmetrical.

0, 0, 0, 1, 4, 16, 50, 158, 472, 1406, 4111, 11998, 34781, 100660, 290464, 837137, 2408914, 6925100, 19888057, 57071610

Offset: 1

Author

N. J. A. Sloane, Feb 09 2019

Keywords

• nonn
• more

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 1.
• 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

Cf. A323931.

Extensions

a(13)-a(20) from Cyvin, Brunvoll & Cyvin (Table 14) added by Andrey Zabolotskiy, Feb 16 2023