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A123105 Number of benzenoids with 22 hexagons, C_(2h) symmetry and containing n carbon atoms. 28
2, 32, 138, 510, 1627, 4641, 12646, 31360, 70888, 144276, 261789, 409747, 524600, 462848, 232842 (list; graph; refs; listen; history; text; internal format)
OFFSET

62,1

REFERENCES

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) pp. 842-851. See Table 5 column 6 on page 847.

LINKS

Table of n, a(n) for n=62..76.

EXAMPLE

If n=62 then the number of benzenoids with 22 hexagons with C_(2h) symmetry is 2.

If n=64 then the number of benzenoids with 22 hexagons with C_(2h) symmetry is 32.

If n=66 then the number of benzenoids with 22 hexagons with C_(2h) symmetry is 138.

If n=68 then the number of benzenoids with 22 hexagons with C_(2h) symmetry is 510.

If n=90 then the number of benzenoids with 22 hexagons with C_(2h) symmetry is 232842.

CROSSREFS

Cf. A122539, A121964, A122736, A123044.

Sequence in context: A191997 A274654 A112850 * A123287 A236550 A012642

Adjacent sequences:  A123102 A123103 A123104 * A123106 A123107 A123108

KEYWORD

nonn

AUTHOR

Parthasarathy Nambi, Sep 28 2006

STATUS

approved

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Last modified June 24 09:55 EDT 2019. Contains 324323 sequences. (Running on oeis4.)