Fibonacci numbers are Nature's numbering system. They appear everywhere in Nature, from the leaf arrangement in plants, succulent's rib count/ tubercule arrangement, to the structure of human body.
The Fibonacci sequence is 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, and so on. It begins with the number 1, and each new term from there is the sum of the previous two.
Maths in nature... Fascinating!!! Awesome is God the creator.