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Search: id:A075205
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| A075205 |
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Number of polyominoes with n cells that tile the plane isohedrally. |
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11
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| 1, 1, 2, 5, 12, 35, 104, 342, 1041, 3026, 6512, 23227, 38238, 108204, 278426, 544635, 825654, 3049903, 3375582, 12108377, 21899125, 36960289, 53317222
(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, Polyomino tiling
Eric Weisstein's World of Mathematics, Isohedral Tiling
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CROSSREFS
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Cf. A054359, A075198, A075199, A075200, A075201, A075202, A075203, A075204, A075206, A075214, A075223.
Sequence in context: A148286 A075202 A075203 this_sequence A054359 A148287 A036357
Adjacent sequences: A075202 A075203 A075204 this_sequence A075206 A075207 A075208
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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 04 2003
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