A123284 Number of polyhexes with 24 hexagons, C_(2v) symmetry and containing n carbon atoms.

2, 34, 37, 173, 155, 657, 482, 2206, 1334, 6510, 3315, 18208, 7804, 47329, 16914, 114779, 33879, 258280, 60786, 532865, 98070, 987689, 137195, 1641862, 166882, 2358366, 146898, 2723100, 77267, 2164650, 0, 966300

Offset: 67

Author

Parthasarathy Nambi, Oct 10 2006

Keywords

• nonn
• fini

Comments

a(98) = 966300 is the last nonzero term. Sum(a(n)) = 12574028 = A120991(24). - Markus Voege, Jan 23 2014

Examples

			If n=67 then the number of polyhexes with 24 hexagons with C_(2v) symmetry is 2.
If n=68 then the number of polyhexes with 24 hexagons with C_(2v) symmetry is 34.
If n=69 then the number of polyhexes with 24 hexagons with C_(2v) symmetry is 37.
If n=70 then the number of polyhexes with 24 hexagons with C_(2v) symmetry is 173.
		

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) 842-851. See Table 7 column 7 on page 848.

Crossrefs

Cf. A120991, A122539, A121964, A122736, A123044, A123106, A123105, A123104, A123142.

Extensions

Series corrected a(97)=0 and a(98)=966300; keyword 'fini' by Markus Voege, Jan 23 2014