The table is for N from 4 to 50, and for one-tailed p up to .1.
First find N and the smaller of the two possible values of S. Of course, if the result is not in the predicted direction then a one-tailed p is inappropriate. Indeed, some scientists (not including myself) hold that two-tailed p's should always be used; they are double the one-tailed p's.
Example: if N = 5 and smaller S = 1, then one-tailed p = .06250 and two-tailed p = .125.
The table is in 5 sections; click on the appropriate section.