  The recent QCD calculations of the five-loop beta function and of R(e+e-) to
O(alpha_s^4) provide one more term in the Banks-Zaks expansion in (16.5-nf).
There is no longer any hope that the expansion could extend, even crudely, to
low nf. Above nf=9, however, the results appear to be reasonably consistent
from order to order.
