  We consider a nonlinear Robin problem driven by the $p$-Laplacian. In the
reaction we have the competing effects of two nonlinearities. One term is
parametric, strictly $(p-1)$-sublinear and the other one is $(p-1)$-linear and
resonant at any nonprincipal variational eigenvalue. Using variational tools
from the critical theory (critical groups), we show that for all large enough
values of parameter $\lambda$ the problem has at least five nontrivial smooth
solutions.
