- Two relationships: 13 possibilities.
- Three relationships: 132 possibilities.
- Four relationships: 710 possibilities.
- Five relationships: 2660 possibilities.
Trivia / Triang Relations
This is currently written so that one person can either have a relation with someone or not. If you expand it to have n possible relations (including not knowing them) there are (n^6+3*n^3-n^2-3*n)/6 possibilities. For example: One relationship: 0 possibilities (in this case, not knowing each other is the only possible relation, and if nobody knows each other, it's not a love triangle).