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Search: id:A130914
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| A130914 |
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The number of Kekule structures of the rhombus-shaped benzenoid hydrocarbons. |
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1
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OFFSET
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1,1
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COMMENT
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Here n is the number of aromatic sextets.
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REFERENCES
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I. Gutman, N. Turkovic and B. Furtula, "On distribution of pi electrons in rhombus-shaped benzenoid hydrocarbons", Indian Journal of Chemistry, Vol. 45A (2006), pp. 1601-1604. See Table 1 on page 1602.
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EXAMPLE
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If n=1 then the number of Kekule structures of the rhombus-shaped benzenoid hydrocarbons is 2.
If n=2 then the number of Kekule structures of the rhombus-shaped benzenoid hydrocarbons is 6.
If n=3 then the number of Kekule structures of the rhombus-shaped benzenoid hydrocarbons is 20.
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CROSSREFS
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Adjacent sequences: A130911 A130912 A130913 this_sequence A130915 A130916 A130917
Sequence in context: A045631 A135413 A065345 this_sequence A087944 A056616 A065346
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KEYWORD
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nonn
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AUTHOR
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Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Aug 23 2007
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