ZarankiewiczDB,

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z(15,15) = 61

R. K. Guy [Guy69] gave an incorrect value of 60.

submitted by Andrew Kay on April 22nd, 2016 (link)

11111
1111
1111
1111
1111
1111
1111
1111
1111
1111
1111
1111
1111
11111
111

weight = 61, submitted by Andrew Kay on April 22nd, 2016 (link, raw)

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