### Definition

In mathematics, the **Fibonacci numbers**, commonly denoted **F _{n}** form a sequence, called the

**Fibonacci sequence**, such that each number is the sum of the two preceding ones, starting from 0 and 1. That is,

**F**

F

F

_{0}= 0F

_{1}= 1F

_{n}= F_{n-1}+ F_{n-2}for n > 1