PUMaC 2007 · 数论（A 组） · 第 5 题
PUMaC 2007 — Number Theory (Division A) — Problem 5
题目详情
- Let F be the Fibonacci numbers, defined by F = 0, F = 1, and F = F + F . For each i , n 0 1 n n − 1 n − 2 1 ≤ i ≤ 200, we calculate the greatest common divisor g of f and f . What is the sum of the i i 2007 distinct values of g ? i
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