The Formulas
The Golden Ratio
1+sqrt(5)/2
Fibonacci Sequence
But you have to know the previous number!F(1) = 1
F (2)= 1
F (n) = F (n-1) + F (n-2) for n > 2
And for those not faint of heart
F(n) =(a^n - b^ n)/a-b
Where a and b are the roots of the quadratic equation
x^2-x-1=0Or maybe this one?
F(n)= Phin - (-Phi)-n/sqrt 5
Where Phi has the value 1.618...
The History Page
Natural Fibonacci
Playing with the Numbers
Fibonacci Goes Gold
Aesthetically Pleasing Fibonacci? (Previous Page)
Bibliography and some great Fibonacci links. (Next)