

A123140


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


0



1, 3, 3, 6, 13, 19, 24, 35, 45, 79, 70, 108, 70, 169, 103
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OFFSET

64,2


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 5 on page 847.


LINKS

Table of n, a(n) for n=64..78.


EXAMPLE

If n=64 then the number of benzenoids with 23 hexagons with D_(2h) symmetry is 1.
If n=66 then the number of benzenoids with 23 hexagons with D_(2h) symmetry is 3.
If n=68 then the number of benzenoids with 23 hexagons with D_(2h) symmetry is 3.
If n=70 then the number of benzenoids with 23 hexagons with D_(2h) symmetry is 6.
If n=94 then the number of benzenoids with 23 hexagons with D_(2h) symmetry is 103.


CROSSREFS

Cf. A122539, A121964, A122736, A123044, A123106, A123105, A123104.
Sequence in context: A168073 A231829 A287151 * A123289 A096572 A318540
Adjacent sequences: A123137 A123138 A123139 * A123141 A123142 A123143


KEYWORD

nonn


AUTHOR

Parthasarathy Nambi, Oct 01 2006


STATUS

approved



