# triangular number

> figurate number

**Wikidata**: [Q245102](https://www.wikidata.org/wiki/Q245102)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Triangular_number)  
**Source**: https://4ort.xyz/entity/triangular-number


## References

1. Freebase Data Dumps. 2013
2. BabelNet