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A007630 A queens problem.
(Formerly M5288) 		0
46, 92, 341, 1787, 9233, 45752, 285053, 1846955 (list; graph; refs; listen; history; 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).

CROSSREFS

Sequence in context: A188598 A057454 A121929 * A004923 A044184 A044565

Adjacent sequences:  A007627 A007628 A007629 * A007631 A007632 A007633

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Mira Bernstein, Robert G. Wilson v (rgwv(AT)rgwv.com)

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Last modified February 17 19:13 EST 2012. Contains 206085 sequences.