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A006621
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Zarankiewicz's problem k_3(n,n+1).
(Formerly M4776)
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6
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OFFSET
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3,1
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COMMENTS
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a(n) is the least k such that every n X (n+1) {0,1}-matrix with k ones contains an all ones 3 X 3 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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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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