If anyone's trying to figure out what the "Haruhi Problem" is, logically, because it took me awhile to grok: You have a `n`-episode show, and you want to watch

If anyone's trying to figure out what the "Haruhi Problem" is, logically, because it took me awhile to grok: You have a `n`-episode show, and you want to watch every episode in every possible order. However, if one series-watch-through ends with episode `x` and the next series-watch-through in sequence begins with that same episode `x`, you don't have to watch episode `x` twice in a row. Given these constraints, how do you find the "ideal" way to watch through the entire series, in all possible combinations, in the shortest number of episodes?