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A006619
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Zarankiewicz's problem.
(Formerly M4485)
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0
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OFFSET
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2,1
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COMMENTS
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a(n) is the least k such that every n X (n+2) {0,1}-matrix with k ones contains an all ones 2 X 4 submatrix. - Sean A. Irvine, May 18 2017
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
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Table of n, a(n) for n=2..9.
R. K. Guy, A problem of Zarankiewicz, Research Paper No. 12, Dept. of Math., Univ. Calgary, Jan. 1967. [Annotated and scanned copy, with permission]
R. K. Guy, A many-facetted problem of Zarankiewicz, Lect. Notes Math. 110 (1969), 129-148.
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CROSSREFS
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Sequence in context: A095097 A187227 A224251 * A023487 A045636 A214723
Adjacent sequences: A006616 A006617 A006618 * A006620 A006621 A006622
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KEYWORD
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nonn,more
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AUTHOR
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N. J. A. Sloane.
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STATUS
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approved
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