

A123106


Number of benzenoids with 22 hexagons, C_(2v) symmetry and containing n carbon atoms.


26



4, 8, 56, 54, 211, 178, 770, 493, 2349, 1193, 6479, 2788, 16960, 5908, 40657, 11169, 89378, 19138, 176325, 27984, 311332, 36524, 478536, 35025, 599661, 20387, 517568, 251310
(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. 842851. See Table 5 column 7 on page 847.


LINKS

Table of n, a(n) for n=62..89.


EXAMPLE

If n=62 then the number of benzenoids with 22 hexagons with C_(2v) symmetry is 4.
If n=63 then the number of benzenoids with 22 hexagons with C_(2v) symmetry is 8.
If n=64 then the number of benzenoids with 22 hexagons with C_(2v) symmetry is 56.
If n=65 then the number of benzenoids with 22 hexagons with C_(2v) symmetry is 54.
If n=90 then the number of benzenoids with 22 hexagons with C_(2v) symmetry is 251310.


CROSSREFS

Cf. A122539, A121964, A122736, A123044.
Sequence in context: A214603 A192508 A231601 * A123288 A192200 A063083
Adjacent sequences: A123103 A123104 A123105 * A123107 A123108 A123109


KEYWORD

nonn


AUTHOR

Parthasarathy Nambi, Sep 28 2006


STATUS

approved



