%0 Journal Article %T Orbitwise countings in H(2) and quasimodular forms %A Samuel Leli¨¨vre %A Emmanuel Royer %J Mathematics %D 2005 %I arXiv %R 10.1155/IMRN/2006/42151 %X We prove formulae for the countings by orbit of square-tiled surfaces of genus two with one singularity. These formulae were conjectured by Hubert & Leli\`{e}vre. We show that these countings admit quasimodular forms as generating functions. %U http://arxiv.org/abs/math/0509205v2