Well, this is embarrassing.
I've spent the last 20 minutes looking for a particular question on main but haven't been able to find it at all. This question involves something like the growth of $n!/(a!b!)$ whenever $a+b$ divides $n$, or something like that.
Does anyone have a link to the question that I'm looking for?
I clearly remember that one of the users involved in either asking or answering this question was called "chatish", and this person had been on the high-rep pages for the last quarter (something like 3k rep over 3 months or something, astronomically high). Now there is no sign of this user. So,
What happened to chatish?
Thanks, and sorry for the lousy memory!