Good deal -- we'll see if we can get a clarification from her, and see if she meant anything like that. I hope so, for the sake of the class.

So far they've only been dealing with n-1 and A-sub-n-minus-1 constructions, so I'm pretty sure she wasn't thinking of the 3n-5. If so, then she's thinking ahead of where they are and that would be a good thing, too!