A magic square is an arrangement of n2 numbers into n rows and n columns using distinct numbers from 1 up to n2 such that the sum in any row, any column or any of the two diagonals is fixed. Consider the 4 by 4 magic square below: a1 a5 2 13a2 10 11 a7a3 6 a4 124 15 a6 1 What is the value of a1 ?
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Calculate the magic constant