4,1
a(n) is the least k such that every n X n {0,1}-matrix with k ones contains an all ones 3 X 4 submatrix. - Sean A. Irvine, May 17 2017
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).
Table of n, a(n) for n=4..8.
Sequence in context: A076379 A227095 A038753 * A114867 A109288 A018889
Adjacent sequences: A006612 A006613 A006614 * A006616 A006617 A006618
nonn,more
N. J. A. Sloane.
approved
