The first order 16 trimagic square was constructed by Chen Qin-wu and Chen Mu-tian in 2005. In this square, the numbers are arranged horizontally symmetrically. In 2008, Li Wen produced another trimagic square of this order.
From this original square can then be formed by symmetrical row-column permutations n!!/2 more squares.
|Chen Qin-wu - Chen Mu-tian (2005)|
|Li Wen (2008)|