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A001071
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Number of one-sided chessboard polyominoes with n cells.
(Formerly M0173 N0067)
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2
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2, 1, 4, 10, 36, 108, 392, 1363, 5000, 18223, 67792, 252938, 952540, 3602478, 13699554, 52296713, 200406388
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Two polyominoes cut from a chessboard are considered the same for this sequence if the shapes of the polyominoes are related by a rotation or translation, and the colourings are related by any symmetry including a reflection. - Joseph Myers, Oct 01 2011
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REFERENCES
| W. F. Lunnon, personal communication.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| Joseph Myers, Chessboard polyominoes
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CROSSREFS
| Cf. A001933, A121198.
Sequence in context: A134654 A198262 A085421 * A121198 A016544 A134028
Adjacent sequences: A001068 A001069 A001070 * A001072 A001073 A001074
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KEYWORD
| hard,nonn,more
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| Extended by Joseph Myers (jsm(AT)polyomino.org.uk), Oct 01 2011
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