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A290711 Number of irredundant sets in the n X n queen graph. 2
2, 5, 38, 447, 7103, 155787, 4230944, 151369830 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The maximum size of an irredundant set in the n X n queen graph is A075692(n). - Andrew Howroyd, Aug 09 2017

LINKS

Table of n, a(n) for n=1..8.

Matthew D. Kearse and Peter B. Gibbons, Computational Methods and New Results for Chessboard Problems, CDMTCS Research Reports CDMTCS-133 (2000).

Eric Weisstein's World of Mathematics, Irredundant Set

Eric Weisstein's World of Mathematics, Queen Graph

CROSSREFS

Cf. A075692, A286883, A287070, A291103.

Sequence in context: A036780 A051501 A221681 * A228837 A206155 A135378

Adjacent sequences:  A290708 A290709 A290710 * A290712 A290713 A290714

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein, Aug 09 2017

EXTENSIONS

a(5)-a(8) from Andrew Howroyd, Aug 19 2017

STATUS

approved

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Last modified July 17 18:47 EDT 2019. Contains 325109 sequences. (Running on oeis4.)