Is ([(n+1)(n+2)(n+3)]/6 the formula for some summation? Thanks.

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- September 15th 2010, 12:02 PMtarheelbornSummation
Is ([(n+1)(n+2)(n+3)]/6 the formula for some summation? Thanks.

- September 15th 2010, 12:17 PMundefined
Tetrahedral numbers. (Can be seen as summation of triangle numbers.)

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