A123141 Number of benzenoids with 23 hexagons, C_(2h) symmetry and containing 2n carbon atoms.

6, 45, 145, 510, 1706, 4697, 12446, 32297, 73731, 147440, 274532, 454304, 594505, 514849, 245895

Offset

33,1

Links

Table of n, a(n) for n=33..47.

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 6 on page 847.

Formula

Sum_n a(n) = 2357108 = A121210(23). - Andrey Zabolotskiy, Nov 15 2023

Crossrefs

Cf. A122539, A121964, A122736, A123044, A123106, A123105, A123104, A121210.

Sequence in context: A131513 A204558 A354477 * A122096 A302709 A054563

Adjacent sequences: A123138 A123139 A123140 * A123142 A123143 A123144

Keyword

nonn,fini,full

Author

Parthasarathy Nambi, Oct 01 2006

Extensions

Name and offset edited by Andrey Zabolotskiy, Nov 15 2023

Status

approved