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A122736 Number of benzenoids with 21 hexagons, C_(3h) symmetry and containing n carbon atoms. 30
2, 4, 21, 44, 103, 232, 480, 577, 460 (list; graph; refs; listen; history; text; internal format)
OFFSET

61,1

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 4 column 4 on page 846.

LINKS

Table of n, a(n) for n=61..69.

EXAMPLE

If n=61 then the number of benzenoids with 21 hexagons with C_(3h) symmetry is 2.

If n=64 then the number of benzenoids with 21 hexagons with C_(3h) symmetry is 4.

CROSSREFS

Cf. A122539, A121964.

Sequence in context: A102049 A058522 A292534 * A296276 A092458 A071779

Adjacent sequences:  A122733 A122734 A122735 * A122737 A122738 A122739

KEYWORD

nonn

AUTHOR

Parthasarathy Nambi, Sep 24 2006

STATUS

approved

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Last modified October 16 09:02 EDT 2021. Contains 348041 sequences. (Running on oeis4.)