# friendship graph

> planar undirected graph with 2n+1 vertices and 3n edges

**Wikidata**: [Q5504427](https://www.wikidata.org/wiki/Q5504427)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Friendship_graph)  
**Source**: https://4ort.xyz/entity/friendship-graph


## References

1. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)