

A123141


Number of benzenoids with 23 hexagons, C_(2h) symmetry and containing n carbon atoms.


0



6, 45, 145, 510, 1706, 4697, 12446, 32297, 73731, 147440, 274532, 454304, 594505, 514849, 245895
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OFFSET

66,1


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) 842851. See Table 6 column 6 on page 847.


LINKS

Table of n, a(n) for n=66..80.


EXAMPLE

If n=66 then the number of benzenoids with 23 hexagons with C_(2h) symmetry is 6.
If n=68 then the number of benzenoids with 23 hexagons with C_(2h) symmetry is 45.
If n=70 then the number of benzenoids with 23 hexagons with C_(2h) symmetry is 145.
If n=72 then the number of benzenoids with 23 hexagons with C_(2h) symmetry is 510.
If n=94 then the number of benzenoids with 23 hexagons with C_(2h) symmetry is 245895.


CROSSREFS

Cf. A122539, A121964, A122736, A123044, A123106, A123105, A123104.
Sequence in context: A273507 A131513 A204558 * A122096 A302709 A054563
Adjacent sequences: A123138 A123139 A123140 * A123142 A123143 A123144


KEYWORD

nonn


AUTHOR

Parthasarathy Nambi, Oct 01 2006


STATUS

approved



