Source: wikibot/freudenthal-magic-square
= Freudenthal magic square
{wiki=Freudenthal_magic_square}
The Freudenthal magic square is a specific arrangement of numbers that forms a 3x3 grid where the sums of the numbers in each row, column, and the two main diagonals all equal the same value, thus giving it the properties of a magic square. It is named after the Dutch mathematician Hans Freudenthal.