  People construct quantum bound states either non-numerically (in not too many
exceptional cases) or, in general, numerically (mainly using majorization or
discretization techniques). We point out that there exists a class of
interactions "in between". Being, in conventional terminology, neither exactly
solvable nor purely numerical. The idea is illustrated by the elementary
exponential-well toy-model potential $V(x)= -g^2\exp (-|x|)$.
