Thanks to Leonardo Pisano Bigollo, well known as **Leonardo Fibonacci.**

He was an Italian mathematician from the Republic of Pisa, who proposed a mathematical sequence which then turned out to bring golden ratio into existence.

The Fibonacci series is built as follows

a, b, (a+b)…

The next number in the series is generated by simply adding the preceding two numbers in series. So the series will be as follows

1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377… and so on.