Online Course Discussion Forum
What I've found out is that the most number of friends one person can have is 4, since they have the same number of friends. Also, the cases for 1 and 4 are the same, since for 4, you can take the cases for 1 and turn them into not-friends. Same for 2 and 3. So you have to first find out the cases for 1 and 2, then multiply by two.