Triangular number: Difference between revisions
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{{Wikipedia}} | |||
The '''triangular number''' or '''triangle number''' (T<sub>n</sub>) gives the sum of integers starting at 1 up to n. It's the amount of objects in a dense planar equilateral arrangement. | The '''triangular number''' or '''triangle number''' (T<sub>n</sub>) gives the sum of integers starting at 1 up to n. It's the amount of objects in a dense planar equilateral arrangement. | ||
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== See also == | == See also == | ||
* [[OEIS: A000217]] | * [[OEIS: A000217]] | ||
[[Category:Math]] | [[Category:Math]] | ||