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

1,5

Links

Table of n, a(n) for n=1..20.

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.

Sequence in context: A345325 A203094 A298173 * A121184 A203840 A089093

Adjacent sequences: A323929 A323930 A323931 * A323933 A323934 A323935

Keyword

nonn,more

Author

N. J. A. Sloane, Feb 09 2019

Extensions

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

Status

approved