Settings: Formula 51, Render 3 Orbit Counting, Transform 3 Arctan, Inside-Out, Color 13-1 modified.
I upped the stalks and bubbles on the Parameters dialog box from the default of .0500 to .1000. Formulas 50 and 52 give images similar to this. The arctan Transform setting is what makes this formula look like this. If you switch it back to the first Transform setting of "none" it doesn't look very interesting at all.