So then since neither of those worked, it seems all we're left with is the Ansus formula and the Cauchy integral (but determining the correct contours and asymptotic behavior, now that's the rub...).
I'm also curious: What about \( b = e^{-e} \) exactly? You said it converges slowly, but how do you iterate it at all? What is the asymptotic as the tower \( x \rightarrow \infty \)?
I'm also curious: What about \( b = e^{-e} \) exactly? You said it converges slowly, but how do you iterate it at all? What is the asymptotic as the tower \( x \rightarrow \infty \)?

