A006624 - OEIS

A006624

a(n) is the least k such that every n X (n+3) {0,1}-matrix with k ones contains an all-ones 2 X 4 submatrix.
(Formerly M4600)

9, 14, 20, 27, 33, 41, 49, 57

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OFFSET

2,1

REFERENCES

R. K. Guy, A many-facetted problem of Zarankiewicz, Lect. Notes Math. 110 (1969), 129-148.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

CROSSREFS

KEYWORD

nonn,more

AUTHOR

EXTENSIONS

Replaced definition with more precise version from a comment of Sean A. Irvine from May 18 2017. - N. J. A. Sloane, Feb 04 2024

STATUS

approved