that is a magic square to n* n natural numbers line up every trip, every out, and each diagonal figures and have the same matrix. This is a popular method. Sources with papers and notes

Packet : 67273奇数阶幻方.zip filelist
readme.txt
奇数阶幻方/
奇数阶幻方/magic.c
奇数阶幻方/magic.exe
奇数阶幻方/程序说明.txt

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