User blog comment:Ikosarakt1/Fast-growing hierarchy/@comment-5029411-20130625130915

e(1)[n] = e(0)^(e(1)[n-1])

e(w)[n] = e(w[n])

z(0)[n] = e(z(0)[n-1])

phi(w,0)[n] = phi(w[n],0)

gamma(0)[n] = phi(gamma(0)[n-1],0)?!