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Pyramidal numbers

Revision as of 18:15, 14 December 2015 by Themathematicstiger7 (talk | contribs) (Created page with "The Pyramidal Numbers are the numbers <math>n</math> which are the sum of the first <math>n</math> triangular numbers. The formula for their sum is <math>(n)(n+1)(n+2)/6</math>.")
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The Pyramidal Numbers are the numbers $n$ which are the sum of the first $n$ triangular numbers. The formula for their sum is $(n)(n+1)(n+2)/6$.

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