`sum_(i = 0)^n i^2 = ( "n" ( "n" +1)(2 "n" +1))/6`

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This equation computes the summation of squared integers:

`sum_(i = 0)^n I^2`

This summation is referred to as a pyramid number, or square pyramidal number. It represents the number of objects in a pyramid-shaped stack with a square base. Square pyramidal numbers count the number of squares in an n × n grid.