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What are tetrahedral numbers?

Updated: 12/19/2022
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11y ago

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They are a sequence of numbers defined in a manner that is analogous to triangle numbers. They are the sums of the first n triangular number. The general formula for the nth tetrahedral number is:Tn = n*(n+1)*(n+2)/6.


The first few are: 1, 4, 10, 20, 35.



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