Technical data for this type of fractal : click here.

For the fractal here :
fn1=tan, fn2=tanh, fn3=cotanh, fn4=recip
real(p1) = 3, imag(p1) = 8, real(p2) = 0, imag(p2) = 0, real(p3) = -0.31, imag(p3) = -0.31