|
| |
|
|
A120448
|
|
Number of isomers of polyhex hydrocarbons with C_(2v) symmetry with nineteen hexagons.
|
|
0
|
|
|
|
0, 3, 17, 14, 92, 60, 316, 175, 814, 495, 2323, 1402, 6037, 3113, 12851, 6200, 24710, 11851, 46152, 18123, 72151, 18007, 74547, 8970, 40141
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
54,2
|
|
|
COMMENTS
|
See Table 4 column 9 on page 615 of the paper by Caporossi and Hansen. Also the sequence starts for the hydrocarbon C_(54)H_(18).
|
|
|
REFERENCES
|
G. Caporossi and P. Hansen, "Enumeration of Polyhex Hydrocarbons to h=21", J. Chem. Inf. Comput. Sci., vol. 38 (1998) pp. 610-619.
|
|
|
LINKS
|
Table of n, a(n) for n=54..78.
|
|
|
EXAMPLE
|
If the number of carbons is 56 then the number of isomers of polyhex hydrocarbons with C_(2v) symmetry with nineteen hexagons is 17 which is the third term in the sequence.
|
|
|
CROSSREFS
|
Cf. A018190.
Sequence in context: A088122 A087964 A174182 * A095422 A195999 A059189
Adjacent sequences: A120445 A120446 A120447 * A120449 A120450 A120451
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
Parthasarathy Nambi, Aug 27 2006
|
|
|
STATUS
|
approved
|
| |
|
|
