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Search: id:A122539
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| A122539 |
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Number of benzenoids with 21 hexagons with D_(2h) symmetry. |
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32
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| 1, 3, 5, 8, 12, 16, 16, 42, 31, 43, 45, 73, 30, 40
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OFFSET
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60,2
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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 5 on page 846.
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EXAMPLE
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If n=70 then the number of benzenoids with 21 hexagons with D_(2h) symmetry is 16.
If n=86 then the number of benzenoids with 21 hexagons with D_(2h) symmetry is 40.
Starting value of n is 60 and is even.
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CROSSREFS
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Adjacent sequences: A122536 A122537 A122538 this_sequence A122540 A122541 A122542
Sequence in context: A100464 A114891 A045716 this_sequence A023660 A023562 A000212
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KEYWORD
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nonn,uned
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AUTHOR
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Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Sep 18 2006
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