Technical data for this type of fractal : click here.

For the fractal here :
fn1 = tan(), fn2 = sqr(), fn3 = tan(), fn4 = asinh()
real(p1) = 1, imag(p1) = 16, real(p2) = -9, imag(p2) = 0, real(p3) = 6, imag(p3) = -6