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Sum of Squares Calculator

n1:
n2:

About Sum of Squares Calculator

The online Sum of Squares calculator is used to calculate the sum of first n squares or the sum of consecutive square numbers from n12 to n22.

Sum of Squares Formula

The sum of the first n square numbers is equal to:

n(n + 1)(2n + 1) / 6

The sum of consecutive square numbers from n12 to n22 is equal to:

n12 + (n1 + 1)2 + ... + n22 = n2(n2 + 1)(2n2 + 1) / 6 - n1(n1 - 1)(2n1 - 1) / 6

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