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Proofs without words
1 points
by
TriinT
over 15 years ago
1 comment
jgrahamc
over 15 years ago
Similar: <a href="http://www.jgc.org/blog/2008/02/sum-of-first-n-odd-numbers-is-always.html" rel="nofollow">http://www.jgc.org/blog/2008/02/sum-of-first-n-odd-numbers-i...</a>