Numbers that are happy and numbers that are melancoil

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27 February, 2012 by ehauke

Check out this nice video of Matt Parker (@standupmaths) demonstrating how some numbers are happy numbers (adding their squares sequentially will always lead to 1), or melancoil numbers (adding their squares sequentially will always lead to a fruitless loop). I’m not great at maths, so maths that I can see is my favourite kind!

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