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A123140
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Number of benzenoids with 23 hexagons, D_(2h) symmetry and containing n carbon atoms.
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0
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1, 3, 3, 6, 13, 19, 24, 35, 45, 79, 70, 108, 70, 169, 103
(list; graph; refs; listen; history; internal format)
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OFFSET
| 64,2
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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) 842-851. See Table 6 column 5 on page 847.
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EXAMPLE
| If n=64 then the number of benzenoids with 23 hexagons with D_(2h) symmetry is 1.
If n=66 then the number of benzenoids with 23 hexagons with D_(2h) symmetry is 3.
If n=68 then the number of benzenoids with 23 hexagons with D_(2h) symmetry is 3.
If n=70 then the number of benzenoids with 23 hexagons with D_(2h) symmetry is 6.
If n=94 then the number of benzenoids with 23 hexagons with D_(2h) symmetry is 103.
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CROSSREFS
| Cf. A122539, A121964, A122736, A123044, A123106, A123105, A123104.
Sequence in context: A056494 A168076 A168073 * A123289 A096572 A110523
Adjacent sequences: A123137 A123138 A123139 * A123141 A123142 A123143
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KEYWORD
| nonn
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AUTHOR
| Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Oct 01 2006
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