Broken diagonal
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A broken diagonal is a sequence of n diametrically-positioned cells in a panmagic square which spans the vertical boundary. Examples of broken diagonals from the below square are as follows: 3,12,14,5, 10,1,7,16, 10,13,7,4, 15,8,2,9, 15,12,2,5, and 6,13,11,4.