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Search: id:A075208
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| A075208 |
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Number of polyhexes with n cells that tile the plane by translation but not by 180-degree rotation (Conway criterion). |
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+0
11
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| 0, 0, 0, 0, 0, 0, 1, 1, 14, 30, 88, 929, 989, 3859, 16557, 35017, 46506, 256901, 256721, 1286189, 2306003
(list; graph; listen)
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OFFSET
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1,9
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REFERENCES
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Branko Gruenbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Section 9.4.
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LINKS
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Joseph Myers, Polyhex tiling
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CROSSREFS
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Cf. A070766, A075207, A075209, A075210, A075211, A075212, A075213, A075214, A075215, A075199, A075217.
Sequence in context: A027575 A104776 A101960 this_sequence A015222 A054103 A161454
Adjacent sequences: A075205 A075206 A075207 this_sequence A075209 A075210 A075211
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KEYWORD
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hard,nonn
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AUTHOR
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Joseph Myers (jsm(AT)polyomino.org.uk), Sep 08 2002
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EXTENSIONS
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More terms from Joseph Myers (jsm(AT)polyomino.org.uk), Nov 08 2003
More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), May 05 2007
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