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Tuesday, November 2, 2010

Stuff For a Tuesday

I previously posted about the intriguing and unsolved "Collatz Problem" (whether or not certain created sequences always must end in the same pattern, regardless of starting point). It is also known by the name "Hailstone Numbers" and Ben Vitale recently wrote about them here:

http://benvitale-funwithnum3ers.blogspot.com/2010/10/list-of-squares.html?spref=tw

Clifford Pickover addresses the same subject here:

http://sprott.physics.wisc.edu/pickover/hailstone.html

Meanwhile, in a different vein, I just recently discovered this fairly young blog devoted entirely to prime numbers:

http://primepatterns.wordpress.com/

Finally, I've never been much of a Sudoku fan, but I do very much enjoy Ken-Ken (are there others like me out there, and if so, why is that???)... In any event, this poster's been thinking more about Ken-Ken than I ever did:

http://bit-player.org/2010/kenken-friendly-numbers

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