Given n (only odd), return output matrix a that has concentric rings of the numbers 1 through (n+1)/2 around the center point.

For n = 3,

a = [2 2 2;
     2 1 2;
     2 2 2;]

For n = 5,

a = [3 3 3 3 3;
     3 2 2 2 3;
     3 2 1 2 3;
     3 2 2 2 3;
     3 3 3 3 3;]
Solve

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Last Solution submitted on Dec 29, 2025

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George Berken David Hill Riccardo G. Hong Son

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