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when toggle format what by license comment
May 29, 2014 at 16:05 comment added მამუკა ჯიბლაძე Right, thanks. Except it is somehow not totally clear to me whether this after all answers the original question...
May 29, 2014 at 16:03 comment added David E Speyer For $k>n$, its obviously zero and for $k=n$, its obviously $1$. For $k<n$, take $m=k$ to get $0$.
May 29, 2014 at 15:56 history answered მამუკა ჯიბლაძე CC BY-SA 3.0