Lets say we have 6 places: and we want to pass by these places in a way that we always start by and end by and that always comes after . I'm thinking of , I know it's 6, why I used this formula is because it works for 4 places: ...
(1) What if each time, our trip starts by or , we get a total of ?
(2) What about when there are 8 places, is it ?
Thanks for the help!