What is the maximum number of terms I should sum for a band limited signal?

Question

I'm using this formula to calculate each point on a band limited square wave:

For any given frequency f, what is the maximum number of terms I can sum without my output function containing a frequency that exceeds a given frequency fMax?

Answer 1

The frequency of the first term is $f$, the second $3f$, the third is $5f$ and so on. Keep going until you hit $f_{max}$