# Category:Closed Form for Triangular Numbers

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## Pages in category "Closed Form for Triangular Numbers"

The following 11 pages are in this category, out of 11 total.

### C

- Closed Form for Triangular Numbers
- Closed Form for Triangular Numbers/Direct Proof
- Closed Form for Triangular Numbers/Proof by Arithmetic Progression
- Closed Form for Triangular Numbers/Proof by Induction
- Closed Form for Triangular Numbers/Proof by Polygonal Numbers
- Closed Form for Triangular Numbers/Proof by Recursion
- Closed Form for Triangular Numbers/Proof by Telescoping Sum
- Closed Form for Triangular Numbers/Proof using Bernoulli Numbers
- Closed Form for Triangular Numbers/Proof using Binomial Coefficients
- Closed Form for Triangular Numbers/Proof using Cardinality of Set
- Closed Form for Triangular Numbers/Proof using Odd Number Theorem