# nonagonal number

> polygonal number

**Wikidata**: [Q2702442](https://www.wikidata.org/wiki/Q2702442)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Nonagonal_number)  
**Source**: https://4ort.xyz/entity/nonagonal-number


## References

1. Freebase Data Dumps. 2013