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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
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2, 4, 0, 2, 10, 32, 38, 140, 496, 1186, 3178, 16792, 82038, 289566
(list; graph; refs; listen; history; internal format)
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OFFSET
| 4,1
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REFERENCES
| 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
| Cf. A051224, A051223.
Sequence in context: A004516 A153182 A111818 * A155517 A123514 A064178
Adjacent sequences: A007628 A007629 A007630 * A007632 A007633 A007634
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KEYWORD
| nonn,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Mira Bernstein, Robert G. Wilson v (rgwv(AT)rgwv.com)
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