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A006624 Zarankiewicz's problem.
(Formerly M4600)
0
9, 14, 20, 27, 33, 41, 49, 57 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

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

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=2..9.

CROSSREFS

Sequence in context: A302056 A173792 A034703 * A184218 A272527 A272308

Adjacent sequences:  A006621 A006622 A006623 * A006625 A006626 A006627

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified January 18 05:30 EST 2019. Contains 319269 sequences. (Running on oeis4.)