If ω is a complex cube root of unity with ω≠1 and p=[pij] is a n×n matrix with pij=ωi+j. Then, p2≠0, when n is equal to
Let ω be a complex cube root of unity with ω≠0 and P=[pij] be an n×n matrix with Pij=ωi+j. Then P2=0 when n is equal to