Log Spiral fractal

Parameters suggested by Chris Thomasson, c₁=1.3, c₂=0.11, c₃=0.42457, c₄=1.2.

The original implementation by Chris Thomasson did an integer division of 1/n in the denominator of the equation above, whereas my images above do a floating point division. The original images from Chris Thomasson look like the following.

Buddhabrot style rendering superimposed on original.