Magic constant: Difference between revisions
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Implementation:<lang J>mgc=: 0 0.5 0 0.5&p.</lang>
In other words, the magic constant for a magic square of order <tt>x</tt> is the result of the polynomial <code>(0.5*x)+(0.5*x^3)</code>
Task examples:<lang J> mgc 3+i.20
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