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A030529 Number of polyhexes of class PF2. 11
0, 0, 1, 4, 17, 66, 269 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,4

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.

LINKS

Table of n, a(n) for n=2..8.

CROSSREFS

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

Sequence in context: A046723 A291394 A244616 * A323921 A266862 A239845

Adjacent sequences:  A030526 A030527 A030528 * A030530 A030531 A030532

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified August 23 13:53 EDT 2019. Contains 326227 sequences. (Running on oeis4.)