Potter's equation

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Potter's equation is a mathematical formula which computes the number of face cubes in a Rubik's cube of any size.

Equation

For an NxNxN Rubik's cube, the number of face cubes (R) is equal to:

R(N) = 6*N*(N-2) + 8

This equation is only valid for N>2.

Notes

This equation is in no way related to Harry Potter.

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