# Fibonacci Number

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## Fibonacci number

[¦fib·ə¦nä·chē ′nəm·bər] (mathematics)

A number in the Fibonacci sequence whose first two terms are

*f*_{1}=*f*_{2}= 1.## Fibonacci Number

any term in the recursive number sequence 1, 1, 2, 3, 5, 8,.... In this sequence, which is called a Fibonacci sequence, each term, after the second, is the sum of the two previous terms. Fibonacci numbers are named for the medieval mathematician Leonardo Fibonacci.

### REFERENCE

Vorob’ev, N. N.*Chisla Fibonachchi*, 3rd ed. Moscow, 1969.