Fibonacci sequence


You already know what it is!

The famous Fibonacci sequence is a sequence of integers in which each integer is the sum of the two integers before it, starting with \(0\) and \(1.\)

The Fibonacci sequence is defined by the following recurrence relation for \(n \geq 2\): $$f_0 = 0$$ $$f_1 = 1$$ $$f_n = f_{n-1} + f_{n-2}$$
⚠ Some define the first Fibonacci numbers to be \(1\) and \(1.\) Fibonacci actually used \(1\) and \(2.\) On Discretopia, rest assured, we will only ever use \(0\) and \(1\) as the first two Fibonacci numbers.

As the sequence progresses, the ratio between any two consecutive Fibonacci numbers becomes an ever-better approximation of the golden ratio, \(\varphi.\)

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