  Transport through a Hubbard chain of size N (=1,2,3,...) connected to
reservoirs is studied at T = 0 in an electron-hole symmetric case based on the
second-order perturbation theory in U. The result shows a typical even-odd
property corresponding to a Kondo or Mott-Hubbard physics. In this report,
specifically, we study the dependence of the conductance on the coupling
between the chain and reservoirs, which was not examined in detail in our
previous report [Phy. Rev. B 59, 12240 (1999)].
