Fibonacci numbers have all sorts of amazing properties and links to many different kinds of mathematics. They start off with 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89 ...

Leonardo Pisano (1170–1250), or Fibonacci, is perhaps best known for a remarkable sequence of numbers that arises out of a problem that involves breeding rabbits. The problem is contained in the third ...