User blog comment:Wythagoras/FGH Dollars Function/@comment-5150073-20130710155414/@comment-3427444-20130710162911

Remember, we're using psi, not theta. psi_1(alpha) = epsilon(Omega+1+alpha) for alpha<psi(Omega_2), so psi(Omega_2) = psi(psi_1(psi_1(...))) = psi(epsilon(epsilon(...))) = psi(zeta(Omega+1)).