  We consider the zigzag half-nanotubes
  (tight-binding approximation) in a uniform magnetic field which is described
by the magnetic Schr\"odinger operator with a periodic potential plus a
finitely supported perturbation.
  We describe all eigenvalues and resonances of this operator, and theirs
dependence on the magnetic field.
  The proof is reduced to the analysis of the periodic Jacobi operators on the
half-line with finitely supported perturbations.
