Here is one. it returns a list of row lists:

def listPascal(n):
  row = [1] 
  if n == 0: return [row] # Stop condition 
  for c in range(1,n+1):  # Fill row [1,r..r,1] 
    row += [row[-1]*(n-c+1)//c]
  return listPascal(n-1) + [row] # Recurse