Fibanocci sequence

 The Fibonacci sequence is a series of numbers where each number is the sum of the two preceding ones, usually starting with 0 and 1. Here's the beginning of the Fibonacci sequence:

0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ...

To generate the Fibonacci sequence, you add the two previous numbers to get the next one. For example, 

0 + 1 = 1, 1 + 1 = 2, 1 + 2 = 3, 2 + 3 = 5, and so on.