Here's some info from wikipedia in case you're wondering what the XKCD strip is about: http://en.wikipedia.org/wiki/Collatz_conjecture http://en.wikipedia.org/

Here's some info from wikipedia in case you're wondering what the XKCD strip is about: http://en.wikipedia.org/wiki/Collatz_conjecture http://en.wikipedia.org/wiki/Collatz_conjecture