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A030534 Number of polyhexes of class PF2. 9
1, 2, 10, 40, 185, 828, 3805, 17411, 80177, 369639, 1710137, 7931011, 36884730 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,2

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=4..16.

CROSSREFS

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

Sequence in context: A151023 A151024 A151025 * A151026 A151027 A188325

Adjacent sequences:  A030531 A030532 A030533 * A030535 A030536 A030537

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified August 19 18:33 EDT 2019. Contains 326133 sequences. (Running on oeis4.)