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Search: id:A007631
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| A007631 |
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Number of solutions to non-attacking reflecting queens problem.
(Formerly M0929)
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+0
1
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| 2, 4, 0, 2, 10, 32, 38, 140, 496, 1186, 3178, 16792, 82038, 289566
(list; graph; listen)
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OFFSET
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4,1
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REFERENCES
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M. Gardner, Fractal Music, Hypercards and More, Freeman, NY, 1991, p. 240.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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CROSSREFS
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Cf. A051224, A051223.
Sequence in context: A004516 A153182 A111818 this_sequence A155517 A123514 A064178
Adjacent sequences: A007628 A007629 A007630 this_sequence A007632 A007633 A007634
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KEYWORD
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nonn,nice
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Mira Bernstein, Robert G. Wilson v (rgwv(AT)rgwv.com)
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