1.
What's this on your Etch-A-Sketch?
2.
1.
Meet Jason Padgett.
2.
3.
The inner boundary of pi is f(x) = x sin (π/x).
1.
Oh, my god.
2.
How is this possible?
3.
4.
they cannot be solved without a key.
1.
This is what's known as a "look-and-say sequence."
2.
Unlike many number sequences,
3.
this relies not on some mathematical property of the numbers themselves,
4.