A122736 Number of benzenoids with 21 hexagons, C_(3h) symmetry and containing 61+2n carbon atoms.

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

Offset

0,1

Links

Table of n, a(n) for n=0..8.

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 4 column 4 on page 846.

Crossrefs

Cf. A122539, A121964.

Sequence in context: A102049 A058522 A292534 * A296276 A092458 A071779

Adjacent sequences: A122733 A122734 A122735 * A122737 A122738 A122739

Keyword

nonn,fini,full

Author

Parthasarathy Nambi, Sep 24 2006

Extensions

Name and offset edited by Andrey Zabolotskiy, Nov 15 2023

Status

approved