Mathy, Nerdy Goodness

This is a pretty cool site giving a list of natural numbers together with what makes them 'special'. For example:

2484 is the number of regions the complex plane is cut into by drawing lines between all pairs of 18^th roots of unity.

7 is the smallest number of faces of a regular polygon that is not constructible by straightedge and compass.

So very, very nerdy but so very, very cool!

(via Boing Boing)