Suppose a1,a2,a3,...is a sequence dened as follows: a1 =1,
Chapter 5, Problem 5.166(choose chapter or problem)
Suppose a1,a2,a3,...is a sequence dened as follows: a1 =1, a2 =3, ak =ak2 +2ak1 for all integers k 3. Prove that an is odd for all integers n 1.
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