Series de Poincare motiviques geometrique et arithmetique d'un germe   d'hypersurface irreductible quasi-ordinaire
  We give here a description of the motivic Poincare series in case of irreducible quasi-ordinary hypersurfaces in all dimension. We give an explicit formula in a particular case. Finally, for such singularities, we give a constructive proof of a result of rationnality of such series proved by Denef and Loeser in all generality. 
Guillaume Rond