Or Fourier coefficients :-) Or pretty much anything where the index/subscript is related to the math itself. Math textbooks and papers tend to use 1-based sub

Or Fourier coefficients :-) Or pretty much anything where the index/subscript is related to the math itself. Math textbooks and papers tend to use 1-based subscripts when it doesn't matter. It's hard to come up with examples where starting at 1 facilitates the actual math.