Portal:Fibonacci numbers



In mathematics, the Fibonacci numbers, commonly denoted $$F_n$$, form a sequence, called the Fibonacci sequence, such that each number is the sum of the two preceding ones, starting from 0 and 1. That is,
 * $$F_0=0,\quad F_1= 1,$$

and
 * $$F_n=F_{n-1} + F_{n-2},$$

for $$n > 1$$.

The beginning of the sequence is thus:
 * $$0,\;1,\;1,\;2,\;3,\;5,\;8,\;13,\;21,\;34,\;55,\;89,\;144,\; \ldots$$

Resources:

 * Golden spiral
 * Fibonacci numbers