A108070 - OEIS

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A108070

Number of fusenes with n hexagons.

9

1, 1, 3, 7, 22, 82, 339, 1505, 7036, 33836, 166246, 829987, 4197273, 21456444, 110716585, 576027737, 3018986040, 15927330105, 84530870455, 451069339063, 2418927725532, 13030938290472, 70492771581350, 382816374644336, 2086362209298079, 11408580755666756

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OFFSET

1,3

LINKS

Table of n, a(n) for n=1..26.

Gunnar Brinkmann, Gilles Caporossi and Pierre Hansen, A constructive enumeration of fusenes and benzenoids, Journal of Algorithms 45 (2002), pp. 155-166.

Gunnar Brinkmann, Gilles Caporossi and Pierre Hansen, A Survey and New Results on Computer Enumeration of Polyhex and Fusene Hydrocarbons, J. Chem. Inf. Comput. Sci., vol. 43 (2003) 842-851.

Eric Weisstein's World of Mathematics, Fusene

CROSSREFS

Cf. A018190, A108071, A108072.

Sequence in context: A323930 A187982 A000228 * A038147 A252784 A364627

Adjacent sequences: A108067 A108068 A108069 * A108071 A108072 A108073

KEYWORD

nonn

AUTHOR

Gunnar Brinkmann, Jun 05 2005

STATUS

approved