An experiential formula for the energy eigenvalues of a particle in a   one-dimension finite-deep square well potential
  We propose an experiential formula for the calculation of the energy eigenvalues of a particle moving in a one-dimension finite-deep square well potential after some physical considerations. This formula shows a simple relation between the energy eigenvalues and the potential papameters, and can be used to estimate the energy eigenvalues in a very simple way. 
Zhi-Ming Zhang and Chun-Hua Yuan