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A123348 Benzenoids (see the Cyvin-Gutman book for details). +0
1
0, 3, 12, 54, 240, 1068, 4752, 21144, 94080, 418608, 1862592 (list; graph; listen)
OFFSET

0,2

REFERENCES

S. J. Cyvin and I. Gutman, Kekule structures in benzenoid hydrocarbons, Lecture Notes in Chemistry, No. 46, Springer, New York, 1988 (see p. 78).

CROSSREFS

Sequence in context: A060460 A120983 A124810 this_sequence A151204 A151205 A151206

Adjacent sequences: A123345 A123346 A123347 this_sequence A123349 A123350 A123351

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Oct 10 2006

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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