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Search: id:A071332
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| A071332 |
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Number of polyiamonds with n cells that tile the plane. |
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+0
12
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| 1, 1, 1, 3, 4, 12, 23, 66, 139, 341, 567, 2034, 2495, 6354, 12908, 30261, 26556, 110145, 95967, 377523, 499672, 788726, 845130, 4998370, 3694670, 7406217, 13175181, 33557076
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OFFSET
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1,4
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REFERENCES
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M. Gardner, Tiling with Polyominoes, Polyiamonds and Polyhexes. Chap. 14 in Time Travel and Other Mathematical Bewilderments. New York: W. H. Freeman, pp. 175-187, 1988.
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LINKS
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Joseph Myers, Polyiamond tiling
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CROSSREFS
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Equals A000577-A071333 and equals A070765-A071334, cf. A054359, A070766.
Sequence in context: A005221 A000206 A075223 this_sequence A006791 A111358 A111357
Adjacent sequences: A071329 A071330 A071331 this_sequence A071333 A071334 A071335
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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), May 19 2002
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EXTENSIONS
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More terms from Joseph Myers (jsm(AT)polyomino.org.uk), Nov 11 2003
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