%I

%S 0,1,2,3,4,6,7,9,10,12,14,16,18,21,22,24,26,29,31,34

%N Zarankiewicz number z(n; C_4).

%D Goddard, Wayne; Henning, Michael A.; and Oellermann, Ortrud R.; Bipartite Ramsey numbers and Zarankiewicz numbers. Discrete Math. 219 (2000), no. 1-3, 85-95.

%K nonn

%O 1,3

%A _N. J. A. Sloane_, Jan 31 2012