A006625 A variant of Zarankiewicz's problem: 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.

14, 21, 28, 36, 45, 55

Offset: 3

Author

N. J. A. Sloane

Keywords

• nonn
• more

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).

Crossrefs

Cf. A006613, A006614, A006615, A006616, A006617, A006618, A006619, A006620, A006621, A006622, A006623, A006624, A006626.

Cf. A001197, A072567, A191965, A191873, A001198, A205805, A347473, A347474, A350304, A350237.

Extensions

Name changed at the suggestion of Sean A. Irvine and a(8) added by Max Alekseyev, Feb 02 2024