A123284 - OEIS

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A123284

Number of polyhexes with 24 hexagons, C_(2v) symmetry and containing n carbon atoms.

2, 34, 37, 173, 155, 657, 482, 2206, 1334, 6510, 3315, 18208, 7804, 47329, 16914, 114779, 33879, 258280, 60786, 532865, 98070, 987689, 137195, 1641862, 166882, 2358366, 146898, 2723100, 77267, 2164650, 0, 966300

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OFFSET

67,1

COMMENTS

a(98) = 966300 is the last nonzero term. Sum(a(n)) = 12574028 = A120991(24). - Markus Voege, Jan 23 2014

LINKS

Table of n, a(n) for n=67..98.

G. Brinkmann, G. Caporossi and P. Hansen, A Survey and New Results on Computer Enumeration of Polyhex and Fusene Hydrocarbons, J. Chem. Inf. Comput. Sci., vol. 43 (2003) 842-851. See Table 7 column 7 on page 848.

EXAMPLE

If n=67 then the number of polyhexes with 24 hexagons with C_(2v) symmetry is 2.

If n=68 then the number of polyhexes with 24 hexagons with C_(2v) symmetry is 34.

If n=69 then the number of polyhexes with 24 hexagons with C_(2v) symmetry is 37.

If n=70 then the number of polyhexes with 24 hexagons with C_(2v) symmetry is 173.

CROSSREFS

Cf. A120991, A122539, A121964, A122736, A123044, A123106, A123105, A123104, A123142.

Sequence in context: A232591 A098869 A131544 * A123606 A062864 A249487

Adjacent sequences: A123281 A123282 A123283 * A123285 A123286 A123287

KEYWORD

nonn,fini

AUTHOR

Parthasarathy Nambi, Oct 10 2006

EXTENSIONS

Series corrected a(97)=0 and a(98)=966300; keyword 'fini' by Markus Voege, Jan 23 2014

STATUS

approved