A122736 - OEIS

%I #9 Nov 16 2023 18:12:58

%S 2,4,21,44,103,232,480,577,460

%N Number of benzenoids with 21 hexagons, C_(3h) symmetry and containing 61+2n carbon atoms.

%H G. Brinkmann, G. Caporossi and P. Hansen, <a href="https://doi.org/10.1021/ci025526c">A Survey and New Results on Computer Enumeration of Polyhex and Fusene Hydrocarbons</a>, J. Chem. Inf. Comput. Sci., vol. 43 (2003) 842-851. See Table 4 column 4 on page 846.

%Y Cf. A122539, A121964.

%K nonn,fini,full

%O 0,1

%A _Parthasarathy Nambi_, Sep 24 2006

%E Name and offset edited by _Andrey Zabolotskiy_, Nov 15 2023