

A121983


Number of benzenoids with 21 hexagons with C_(2v) symmetry containing n carbon atoms.


0



1, 7, 12, 70, 36, 235, 167, 867, 517, 2453, 1262, 6150, 3642, 16214, 8863, 37733, 18149, 75274, 34783, 138929, 60330, 239646, 82662, 335306, 74046, 311055, 33940, 152826, 1635175
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OFFSET

59,2


REFERENCES

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. 842851. See Table 4 column 7 on page 846.


LINKS



EXAMPLE

If n=59 then the number of benzenoids with 21 hexagons with C_(2v) symmetry is 1 which is the first term in the sequence.
If n=70 then the number of benzenoids with 21 hexagons with C_(2v) symmetry is 6150.


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



