

A123645


Number of fusenes with 25 hexagons, D_(2h) symmetry and containing n carbon atoms.


0



2, 5, 6, 10, 19, 31, 47, 62, 91, 97, 196, 226, 264, 355, 349, 274
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OFFSET

70,1


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 11 column 5 on page 850.


LINKS

Table of n, a(n) for n=70..85.


EXAMPLE

If n=70 then the number of fusenes with 25 hexagons with D_(2h) symmetry is 2.
If n=72 then the number of fusenes with 25 hexagons with D_(2h) symmetry is 5.
If n=74 then the number of fusenes with 25 hexagons with D_(2h) symmetry is 6.
If n=76 then the number of fusenes with 25 hexagons with D_(2h) symmetry is 10.
If n=100 then the number of fusenes with 25 hexagons with D_(2h) symmetry is 274.


CROSSREFS

Cf. A122539, A121964, A122736, A123044, A123106, A123105, A123104, A123142, A123289, A123288, A123287, A123286, A123285, A123284, A123277, A123209, A123205.
Sequence in context: A178761 A274037 A227975 * A057252 A057250 A248051
Adjacent sequences: A123642 A123643 A123644 * A123646 A123647 A123648


KEYWORD

nonn


AUTHOR

Parthasarathy Nambi, Nov 14 2006


STATUS

approved



