Perfect square

Revision as of 07:30, 29 June 2006 by Cosinator (talk | contribs) (Sum of squares formula)

An integer $n$ is said to be a perfect square if there is an integer $m$ so that $m^2=n$. The first few perfect squares are 0, 1, 4, 9, 16, 25, 36.

The sum of the first $n$ square numbers (not including 0) is $\frac{n(n+1)(2n+1)}{6}$

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