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
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) pp. 842-851. See Table 5 column 7 on page 847.
Formula
Sum_n a(n) = 2652445 = A120991(22). - Andrey Zabolotskiy, Nov 09 2023
Extensions
a(89) = 0 inserted by Andrey Zabolotskiy, Nov 09 2023