A120448 Number of isomers of polyhex hydrocarbons with C_(2v) symmetry with nineteen hexagons.

0, 3, 17, 14, 92, 60, 316, 175, 814, 495, 2323, 1402, 6037, 3113, 12851, 6200, 24710, 11851, 46152, 18123, 72151, 18007, 74547, 8970, 40141

Offset: 54

Author

Parthasarathy Nambi, Aug 27 2006

Keywords

• nonn

Comments

See Table 4 column 9 on page 615 of the paper by Caporossi and Hansen. Also the sequence starts for the hydrocarbon C_(54)H_(18).

Examples

			If the number of carbons is 56 then the number of isomers of polyhex hydrocarbons with C_(2v) symmetry with nineteen hexagons is 17 which is the third term in the sequence.
		

References

• G. Caporossi and P. Hansen, "Enumeration of Polyhex Hydrocarbons to h=21", J. Chem. Inf. Comput. Sci., vol. 38 (1998) pp. 610-619.

Crossrefs

Cf. A018190.