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

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- Sep 15th 2010, 11:02 AMtarheelbornSummation
Is ([(n+1)(n+2)(n+3)]/6 the formula for some summation? Thanks.

- Sep 15th 2010, 11:17 AMundefined
Tetrahedral numbers. (Can be seen as summation of triangle numbers.)

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