Problem 21. Return the 3n+1 sequence for n

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Solution 366927

Submitted on 9 Dec 2013

Size: 10
Leading solution size is 29.

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yeungor on 19 May 2017

I don't think you should hard code the lists you should be constructing. Regex is fine, but you're limiting yourself by making such a narrow solution.
I personally don't like the regex solution because I'm trying to find interesting things about the language and I don't want to run through and find the shortest non regexp.

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