The Fibonacci series

is formed by starting with 0 and 1 and then adding the latest two numbers to get the next one:

 
  0 1 --the series starts like this.
  0+1=1 so the series is now 
  0 1 1
    1+1=2 so the series continues...
  0 1 1 2 and the next term is
      1+2=3 so we now have
  0 1 1 2 3  and it continues as follows ...

On these pages, the first Fibonacci number is 1, as is the second, the third being 2, the fourth 3 and so on. We will often include Fib(0)=0 too:

n:	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	...
Fib(n):	0	1	1	2	3	5	8	13	21	34	55	89	144	233	377	610	987	..More..

Fibonacci Home Page

updated November 2003