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A121983
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Number of benzenoids with 21 hexagons with C_(2v) symmetry containing n carbon atoms.
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0
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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
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59,2
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REFERENCES
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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. 842-851. See Table 4 column 7 on page 846.
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LINKS
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EXAMPLE
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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.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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