Robert P. Munafo, 2003 Sep 22.
R2F(1/2B1)Sa is the period-3 cardioid mu-atom that forms the largest part of the island R2F(1/2B1)S
As described in the Brown Method entry, there is a precise formula for its boundary.
From the Mandelbrot Set Glossary and Encyclopedia, by Robert Munafo, (c) 1987-2017. Mu-ency index
This page was written in the "embarrassingly readable" markup language RHTF, and was last updated on 2017 Feb 02. s.11