Help with numbering subplots

I needed to plot this equation that varies according to 2 parameters, say m and n. I used a for loop to plot these equations into a 5x5 subplot grid where both parameters go from 1 to 5. Now I just need to add row and column numbers to the left and top of this figure to indicate which plots have what m and n values. I have no idea how to proceed.

Thanks for the help