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Topic:  complex numbers in Pascaltriangle 
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Subject:  complex numbers in Pascaltriangle 
Author:  Maga Péter 
Date:  Mar 8 2004 
(not too difficult but interesting) exercise. Let us sum up the 0th, 3rd, 6th,
9th ... 2004th elements of the 2004th line of the Pascaltriangle, I mean
(2004 choose 0)+(2004 choose 3)+...+(2004 choose 3k)+...+(2004 choose 2004).
Good luck!
 
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