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A030519 Number of polyhexes of class PF2. 9
2, 13, 101, 619, 3641, 20028, 106812, 554352, 2828660 (list; graph; refs; listen; history; internal format)
OFFSET

8,1

COMMENTS

See reference for precise definition.

REFERENCES

S. J. Cyvin et al., Enumeration and classification of benzenoid systems 32. Normal perifusenes with two internal vertices, J. Chem. Inform. Comput. Sci., 32 (1992), 532-540.

CROSSREFS

Cf. A026106, A026118, A026298, A030519, A030520, A030525, A030529, A030532, A030534.

Sequence in context: A184019 A064325 A123619 * A141116 A077246 A107000

Adjacent sequences:  A030516 A030517 A030518 * A030520 A030521 A030522

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 17 21:13 EST 2012. Contains 206085 sequences.