  The localization of one-electron states in the large (but finite) disorder
limit is investigated. The inverse participation number shows a non--monotonic
behavior as a function of energy owing to anomalous behavior of few-site
localization. The two-site approximation is solved analytically and shown to
capture the essential features found in numerical simulations on one-, two- and
three-dimensional systems. Further improvement has been obtained by solving a
three-site model.

Disordered Systems and Neural Networks