pythonize this!

[superpollo]

goal (from e.c.m.): evaluate 
1^2+2^2+3^2-4^2-5^2+6^2+7^2+8^2-9^2-10^2+...-2010^2, where each three 
consecutive + must be followed by two - (^ meaning ** in this context)

my solution:
>>> s = 0
>>> for i in range(1, 2011):
...     s += i**2
...     if not (i+1)%5:
...         s -= 2*i**2
...     if not i%5:
...         s -= 2*i**2
...
>>> print s
536926141
>>>

bye
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