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

Created by Cody Team

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A Collatz sequence is the sequence where, for a given number n, the next number in the sequence is either n/2 if the number is even or 3n+1 if the number is odd. The sequence always terminates with 1.
So if
 n = 13
then
 c = [13    40    20    10     5    16     8     4     2     1]

Solve

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Last Solution submitted on Dec 11, 2023

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Cedric Wannaz on 5 Apr 2013

Hep, Cody Team, could you remove my solution please?

Cedric Wannaz on 8 Apr 2013

Thank you!

Mandeep Singh on 14 Jun 2013

nice one but consumes size dunno how to reduce it

jubin soni on 13 Nov 2016

a bit tricky but nice

Pascal Wenger on 17 Feb 2017

I like this problem, because I learnt about the Collatz sequence story. Very interessting.

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

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

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Last 200 Solutions

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Problem Recent Solvers7918

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