Re: 2005 Putnam problems and unofficial solutions (TeX)
- From: "Pinyan" <pinyan@xxxxxxxxx>
- Date: 4 Dec 2005 18:12:57 -0800
I believe your formula on B4 is wrong. For example, f(3,3) = 63,
whereas your formula produces 1 + 2*5!/2!2! = 1+2*120/2*2 = 61.
.
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