It looks like we don't actually need to create a magic square for this problem. We just need to figure out what the magic sum would be.
The test suite needs to be improved. It's a good problem, and building an odd magic square is not that hard, but to avoid cheating the function magic should be prohibited and the test suite should require and test the returned matrix.
Remove any row in which a NaN appears
The Goldbach Conjecture, Part 2
Calculate the Number of Sign Changes in a Row Vector (No Element Is Zero)
Perimeter of a semicircle
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