IMO Shortlist 2012 problem N3


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3. studenoga 2013.
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Determine all integers m \geq 2 such that every n with \frac{m}{3} \leq n \leq \frac{m}{2} divides the binomial coefficient \binom{n}{m-2n}.
Izvor: Međunarodna matematička olimpijada, shortlist 2012