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A006626 Zarankiewicz's problem.
(Formerly M5071)
0
19, 27, 37, 46, 56 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,1

COMMENTS

a(n) is the least k such that every n X (n+1) {0,1}-matrix with k ones contains an all ones 4 X 4 submatrix. - Sean A. Irvine, May 18 2017

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

Table of n, a(n) for n=4..8.

CROSSREFS

Sequence in context: A160036 A032701 A226726 * A259054 A029510 A029537

Adjacent sequences:  A006623 A006624 A006625 * A006627 A006628 A006629

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified January 21 17:07 EST 2019. Contains 319350 sequences. (Running on oeis4.)