The last table in the full is a 6x6 or any number is a square no matters the value of the side and without the combination for itself how we have a 6x6 table or perfect square we gonna have without the combination for itself less one row or line no matters what you subtract or you gonna have an 6x5 or a 5x6, so no matters for multiplication is the same, so is a rectangular of n*(n-1).
Rute Bezerra de Menezes Gondim
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