Bound state solutions of the Schrödinger equation for a PTPT-symmetric potential with Dirac delta functions

We have studied bound states of the Schrödinger equation for a one-dimensional PTPT-symmetric Hamiltonian. The potential of this Hamiltonian contains 2N   Dirac delta functions with complex strengths. We present a method to obtain an equation for the bound state eigenvalues and find the number of bound states for this PTPT-symmetric Hamiltonian.