[seqfan] collatz like sequence

David Newman davidsnewman at gmail.com
Fri Jun 10 10:35:55 CEST 2011

If f(x)= x/2 for x even and f(x)=3x-1 for x odd, then there is more than one
cycle, unlike the situation for the standard Collatz problem.

For example beginning with x=5 and iterating the function we get

I formed the sequence of concatenated cycles of f : 1,2,5,14,7,20,10, but
didn't find it in the encyclopedia.  Is this sequence interesting?

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