The sum of the squares of the first ten natural numbers is,
The square of the sum of the first ten natural numbers is,
Hence the difference between the sum of the squares of the first ten natural numbers and the square of the sum is 3025 
385
= 2640.
Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum.
补充两个公式
证明：倒序相加，
证明：数学归纳法
这都是高中的题目
给出我的python代码：
n = 100 s1 = n*(n+1)/2 # sum of (1..n)1+2+....+n s2 = n*(n+1)*(2*n+1)/6 # sum of (1+2**2+3**2+...n**2) print s1**2-s2
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原文：http://blog.csdn.net/feelang/article/details/26575721