# Math Help - Summation

1. ## Summation

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

2. Originally Posted by tarheelborn
Is ([(n+1)(n+2)(n+3)]/6 the formula for some summation? Thanks.
Tetrahedral numbers. (Can be seen as summation of triangle numbers.)

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