# ZarankiewiczDB,

an online database of Zarankiewicz numbers.

### Matrix for z(7,7 | Δ_2 ∪ {O})

 1 1 1 2 2 2 1 2 2 1 1 2 1 2 2 2 1 1 2 1 2 1 2 1 1 2 2 1 2 1 2 2 1 1 2 1 2 1 2 1 1 2

Found by hand; matches the upper bound given by z(7,7)${} \cdot 2$.

weight = 42, submitted by Andrew Kay on April 26th, 2016 (link, raw)

Related: Matrix 2172