A123106 Number of benzenoids with 22 hexagons, C_(2v) symmetry and containing n carbon atoms.

4, 8, 56, 54, 211, 178, 770, 493, 2349, 1193, 6479, 2788, 16960, 5908, 40657, 11169, 89378, 19138, 176325, 27984, 311332, 36524, 478536, 35025, 599661, 20387, 517568, 0, 251310

Offset

62,1

Links

Table of n, a(n) for n=62..90.

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) pp. 842-851. See Table 5 column 7 on page 847.

Formula

Sum_n a(n) = 2652445 = A120991(22). - Andrey Zabolotskiy, Nov 09 2023

Crossrefs

Cf. A122539, A121964, A122736, A123044.

Sequence in context: A192508 A231601 A347511 * A123288 A192200 A063083

Adjacent sequences: A123103 A123104 A123105 * A123107 A123108 A123109

Keyword

nonn,fini,full

Author

Parthasarathy Nambi, Sep 28 2006

Extensions

a(89) = 0 inserted by Andrey Zabolotskiy, Nov 09 2023

Status

approved