Problem 42673. Longest Collatz Sequence

Created by Jean-Marie Sainthillier

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li haitao on 26 Oct 2018

Please try to solve a harder version "Problem 44448. Project Euler: Problem 14 Longest Collatz sequence"

https://ww2.mathworks.cn/matlabcentral/cody/problems/44448

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Problem 42673. Longest Collatz Sequence

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Problem 42673. Longest Collatz Sequence

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