Highest exponent occuring in the prime factorization of Fib(n). 1, 1, 1, 3, 1, 1, 1, 1, 1, 4, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 5, 2, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 4
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