Triangular number: Difference between revisions
started article, maybe useful for fearlessly adding xenharmonic specifics |
m Todo |
||
| (4 intermediate revisions by 4 users not shown) | |||
| Line 1: | Line 1: | ||
{{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. | ||
Triangular numbers are used in the formation of [[highschool scales]]. | |||
{{todo|expand|inline=1}} | {{todo|expand|inline=1}} | ||
== See also == | == See also == | ||
* [[OEIS: A000217]] | * [[OEIS: A000217]] | ||
[[Category:Math]] | [[Category:Math]] | ||