Need quick solution

Q7 (5 points) Suppose that e1, e2, e3. ... is a sequence of positive integers defined by: e1 = 3, e2 = 5, ent1 = 3en - 2en 1, n > 2. Prove using strong induction that for all n > 1, en = 2" + 1. Make sure to show all the steps in your proof