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A130914
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The number of Kekulé structures of the rhombus-shaped benzenoid hydrocarbons.
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0
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OFFSET
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1,1
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COMMENTS
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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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LINKS
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EXAMPLE
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If n=1 then the number of Kekulé structures of the rhombus-shaped benzenoid hydrocarbons is 2.
If n=2 then the number of Kekulé structures of the rhombus-shaped benzenoid hydrocarbons is 6.
If n=3 then the number of Kekulé structures of the rhombus-shaped benzenoid hydrocarbons is 20.
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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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