ZarankiewiczDB,

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z(10,13) = 40

By adding a column of weight 1 to z(10,12).

lower bound = 40, submitted on April 22nd, 2016 (link)

By Damásdi, Héger and Szőnyi's recursive bound with $\alpha = 1$ and $\beta = 4$. [DHS13, p. 17]

upper bound = 40, submitted on April 22nd, 2016 (link)

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