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Search: id:A075214
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| A075214 |
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Number of polyhexes with n cells that tile the plane isohedrally. |
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+0
11
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| 1, 1, 3, 7, 22, 76, 290, 1018, 3715, 11068, 24289, 102642, 163176, 527675, 1569567, 2929322, 4752512, 21006062, 24293375
(list; graph; listen)
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OFFSET
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1,3
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COMMENT
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A tiling is isohedral if the symmetries of the tiling act transitively on the tiles; a shape is anisohedral if it tiles the plane, but not isohedrally.
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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, A075208, A075209, A075210, A075211, A075212, A075213, A075215, A075205, A075223.
Sequence in context: A148686 A148687 A148688 this_sequence A070766 A111772 A018190
Adjacent sequences: A075211 A075212 A075213 this_sequence A075215 A075216 A075217
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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
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