In how many ways can $9$ friends sit at a dinner table if two of them, Anna and Bob, insist on having exactly two people seated between them? (As usual, two seatings are considered the same if one is a rotation of the other.)

HELLLLLLLLLLLLLLLLLPPPPPPPPPPPP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I get 5040. Is that right?

Guest Jun 19, 2017