Fibonacci series refers to such a series: 0, 1, 1, 2, 3, 5, 8, 13, 2 1, 34, 55, 89, 144, 233. 6765, 10946, 177 1 1,28657,46368,……

This series begins with the third item, each item is equal to the sum of the first two items.

Specifically, item 0 is 0, and item 1 is item 1.

The inventor of Fibonacci sequence is Italian mathematician Leonardo Fibonacci (born in 1 170 and died in 1240, probably from Pisa).