Give the first four terms of the sequence. 72 . n an = n (n - 1)! undefined aj = undefined 72 a, = 72 36 a3 = 36 24 a4 = 24 ? Hint (1 of 2): To find a1 , substitute n = 1 into the formula for an. Next Hint Hint (2 of 2): To find a2, substitute n = 2 into the formula for an, and so on. Submit You have used 1 of 3 attempts Hint Save Reset O Invalid Input: undefined not permitted in answer as a variable