A Caldero-Chapoton formula for generalized Cluster Categories
  The Caldero-Chapoton formula relates for hereditary algebras of Dynkin type the cluster characters of the end terms of an Auslander-Reiten sequence with the cluster character of the middle term. We extend this result to generalized cluster categories with cluster tilting object by considering Auslander-Reiten triangles. 
Salom\'on Dominguez and Christof Geiss
math.RT