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A002564 Queens problem.
(Formerly M3199 N1293)
+0
2
1, 4, 1, 12, 186, 4, 86, 4860 (list; graph; listen)
OFFSET

1,2

REFERENCES

M. A. Sainte-Lagu\"{e}, Les R\'{e}seaux (ou Graphes)}, M\'{e}morial des Sciences Math\'{e}matiques, Fasc. 18, Gauthier-Villars, Paris, 1926, p. 49.

CROSSREFS

Sequence in context: A019237 A019238 A135704 this_sequence A019428 A055252 A116414

Adjacent sequences: A002561 A002562 A002563 this_sequence A002565 A002566 A002567

KEYWORD

nonn

AUTHOR

njas

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.


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