Zarankiewicz's problem k_3(n).

Terms

a(0) =9a(1) =14a(2) =21a(3) =27a(4) =34a(5) =43a(6) =50a(7) =61a(8) =70a(9) =81a(10) =93a(11) =106a(12) =121a(13) =129