ZarankiewiczDB,

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z(13,38) = 96

By the convex optimisation bound with 18 columns of weight 2 and 20 columns of weight 3.

upper bound = 96, submitted on May 3rd, 2016 (link)

1111111
1111111
1111111
1111111
1111111
1111111
1111111
1111111
1111111
1111111
1111111
1111111
111111111111

A construction using Matrix 2035.

lower bound = 96, submitted by Andrew Kay on May 3rd, 2016 (link, raw)

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