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A006625 Zarankiewicz's problem.
(Formerly M4926)
0
14, 21, 28, 36, 45 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

COMMENTS

a(n) is the least k such that every n X (n+2) {0,1}-matrix with k ones contains an all ones 3 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=3..7.

CROSSREFS

Sequence in context: A110478 A125967 A284808 * A114382 A120141 A240593

Adjacent sequences:  A006622 A006623 A006624 * A006626 A006627 A006628

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified January 22 11:56 EST 2019. Contains 319363 sequences. (Running on oeis4.)