A123140 - OEIS

A123140

Number of benzenoids with 23 hexagons, D_(2h) symmetry and containing 2n carbon atoms.

1, 3, 3, 6, 13, 19, 24, 35, 45, 79, 70, 108, 70, 169, 0, 103

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OFFSET

32,2

LINKS

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.

FORMULA

Sum_n a(n) = 748 = A121211(23). - Andrey Zabolotskiy, Nov 09 2023

EXAMPLE

If 2n=64 then the number of benzenoids with 23 hexagons with D_(2h) symmetry is 1.

If 2n=94 then the number of benzenoids with 23 hexagons with D_(2h) symmetry is 103.

CROSSREFS

KEYWORD

nonn,fini,full

AUTHOR

EXTENSIONS

Name and offset corrected and a(46) = 0 inserted by Andrey Zabolotskiy, Nov 09 2023

STATUS

approved