Re: [math-fun] what happened when self-reference met philately?

For every integer n >= 3, does there exist a magic square with this property?

The lo shu arrangement of the stamps has the convenient property that every value up to 45 pataca can be formed from a contiguous subset of the squares. (Unless I just made a mistake.) Indeed we can ensure that the squared in the subarray form a simply- connected polyomino. E.g., to get 40 pataca, omit the 4 and the 1 or the 2 and the 3.

Sincerely, Adam P. Goucher