Hello, new to python a bit. I get an indentation error at line 10, "m -= 1". Sorry if this is a repeated post, I've tried searching but found no solution.
# calculates sum of squares of natural numbers print "Enter number of terms." n = raw.input("Terms? ") first_term = ( ( n * n + n ) / 2 ) - 1 m = n if m != 0: b = m * m + m m -= 1 a = b while m! = 0: a = b b = m * m + m m -= 1 a = a + b else: break second_term = a third_term = 1 answer = first_term + second_term + third_term print answer