For the curious on the subject, who have seen or read The Da Vinci Code, we will explain what the Fibonacci number . These numbers are the sequence of numbers defined by the linear equation:
n F = F n-1 + F n-2
with F 1 = F 2 = 1. As a result of definition, it is conventional to define F 0 = 0.
A version revolt 13, 3, 2, 21, 1, 1, 8, 5 of the first eight Fibonacci numbers appear as one of the tracks that left the keeper killed in the museum, Jacques Saunière, in the novel The Da Vinci Code.
That's the way I see them or so. 
