The Fibonacci sequence is a set of steadily increasing numbers where each number is equal to the sum of the preceding two numbers.

You're probably familiar with Fibonacci series of numbers, first analyzed in a published manuscript by the 13th-century mathematician Leonardo, son of Fibonacci of Pisa (in what is now Italy). The ...

Each number is the sum of the two preceding numbers. Fibonacci’s writings also include a wide variety of astute observations on numbers patterns and important results in number theory.