Technical data for this type of fractal : click here (C06-010).

For the fractal here :
fn1() = cotan (), fn2 = ident(), fn3 = ident(), fn4 = zero().
real(p1) = 1, imag(p1) = 64, real(p2) = 1, imag(p2) = 1, real(p3) = 0, imag(p3) = 4

Note.
With another area, the following fractal is drawned :