OFFSET
52,2
COMMENTS
See Table 3 column 3 on page 614 of the paper by Caporossi and Hansen. Also the sequence starts for the hydrocarbon C_52H_18. If the number of carbons is an odd number then the number of isomers with this symmetry is zero.
REFERENCES
G. Caporossi and P. Hansen, "Enumeration of Polyhex Hydrocarbons to h=21", J. Chem. Inf. Comput. Sci., vol. 38 (1998) pp. 610-619.
EXAMPLE
If the number of carbons is 54 then the number of isomers of polyhex hydrocarbons with C_(2h) symmetry with eighteen hexagons is 14 which is the third term in the sequence.
CROSSREFS
KEYWORD
nonn
AUTHOR
Parthasarathy Nambi, Aug 27 2006
STATUS
approved