  The thickness-dependent energy gap oscillations in the metallic nanofilms are
investigated by the use of the self-consistent numerical solutions of the
Bogoliubov-de Gennes equations. It is shown, that the oscillations are induced
by the quasi-particle energy quantization triggered by the confinement of
electrons in the direction perpendicular to the sample. We have analyzed, how
the changes in the electron density of states ($n_e$) and the electron-phonon
coupling constant ($g$) influence the amplitude of the considered oscillations.
It has been found, that the increase in $n_e$ and the decrease in $g$, can lead
to a significant reduction of the oscillations amplitude. As a result, for the
values of the mentioned parameters corresponding to some of the realistic
situations the thickness-dependent superconducting gap oscillations can be
almost completely suppressed.
