•Fibonacci Numbers: 1, 1, 2, 3, 5, 8, 13, 21, 34, ...
(after the first 2 terms, each number is the sum of the previous two)
•The limit of the ratios of successive terms is called the golden ratio. The golden ratio is 1.618033989 : 1.
•The golden ratio (phi, pronounced “fi”) occurs frequently in nature.