Difference between revisions of "Pyramidal numbers"
(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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Revision as of 18:15, 14 December 2015
The Pyramidal Numbers are the numbers 
which are the sum of the first triangular numbers. The formula for their sum is 
.
