https://en.wikipedia.org/wiki/Ordinal_number Ordinal number Ordinals extend the natural numbers
https://upload.wikimedia.org/wikipedia/commons/thumb/1/18/Ordinal_ww.svg/512px-Ordinal_ww.svg.png A graphical "matchstick" representation of the ordinal ω^2. Each stick corresponds to an ordinal of the form ω・m+n where m and n are natural numbers.