For those who do not know the 
, it is an infinite sequence of natural numbers that begins with the numbers 1 and 1, and from them, each term is obtained by adding the previous two:
1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1,597 ...
The elements of this sequence are called Fibonacci numbers. The name of Fibonacci succession is owed to Leonardo de Pisa, an Italian mathematician of the thirteenth century also known as Fibonacci.
This succession would not have anything of particular but outside because aparace repeatedly in the nature and, in addition, has numerous applications in sciences of the computation, mathematics and theory of games, among others.
to complement I will post a video where it is clearly explained:
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Original Content.Welcome to steem! Good luck!