16,051 formulas for Ottaviani's invariant of cubic threefolds
  We provide explicit combinatorial formulas for Ottaviani's degree 15 invariant which detects cubics in 5 variables that are sums of 7 cubes. Our approach is based on the chromatic properties of certain graphs and relies on computer searches and calculations. 
Abdelmalek Abdesselam, Christian Ikenmeyer, Gordon Royle
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