This is a 2-dimensional representation of the iteration rule [math]a_{n+2} = \frac{a_{n+1}+1}{a_n}[/math]. The points plotted are of the form [math]\left(a_n,a_{n+1} \right)[/math].
In this example, [math]a_1 = a_2[/math]. Moving the slider will change the two starting values.
