

A038141


Number of planar polyhexes with n cells with at least two holes, all holes having size at least two.


2



0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 11, 149, 1618, 15123, 125764
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OFFSET

1,14


COMMENTS

Planar, proper multiple coronoid systems enumerated by area. Free systems are enumerated, i.e., translations, rotations and reflections are regarded as the same configuration.
The last term includes 4 polyhexes with three holes.


REFERENCES

S. J. Cyvin, J. Brunvoll, R. S. Chen, B. N. Cyvin, F. J. Zhang, Theory of Coronoid Hydrocarbons II, Lecture Notes in Chemistry 62, SpringerVerlag, 1994. (see table 3.2, p. 66)


LINKS



CROSSREFS

Cf. A000228 (hexagonal free polyominoes), A038140 (planar single coronoids).


KEYWORD

nonn,more


AUTHOR



EXTENSIONS

Edited by Markus Voege (markus.voege(AT)inria.fr), Dec 03 2003


STATUS

approved



