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A007631 Number of solutions to non-attacking reflecting queens problem.
(Formerly M0929)
0
2, 4, 0, 2, 10, 32, 38, 140, 496, 1186, 3178, 16792, 82038, 289566 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,1

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).

LINKS

Table of n, a(n) for n=4..17.

CROSSREFS

Cf. A051224, A051223.

Sequence in context: A153182 A111818 A272364 * A281765 A155517 A123514

Adjacent sequences:  A007628 A007629 A007630 * A007632 A007633 A007634

KEYWORD

nonn,nice

AUTHOR

N. J. A. Sloane, Mira Bernstein, Robert G. Wilson v

STATUS

approved

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Last modified May 27 09:52 EDT 2017. Contains 287204 sequences.