Progression Nature sum of squares numbers online Calculator tool
formulas ：
progression Nature sum of squares of numbers （Sum of Squares）Sn= ( ( n * ( n + 1 ) * ( 2n + 1 ) ) / 6)
formulas ：
progression Nature sum of squares of numbers （Sum of Squares）Sn= ( ( n * ( n + 1 ) * ( 2n + 1 ) ) / 6)