Square Pyramidal Number

In mathematics, a pyramid number, or square pyramidal number, is a figurate number that represents the number of stacked spheres in a pyramid with a square base. Square pyramidal numbers also solve the problem of counting the number of squares in an n × n grid.

Read more about Square Pyramidal Number:  Formula, Relations To Other Figurate Numbers, Squares in A Square

Famous quotes containing the words square and/or number:

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    Their number would seem limited to three.”
    —Robert Frost (1874–1963)