Wallpaper group 15 of 17, p31m: a hexagonal lattice, point group 3m, 6 operations per cell, orbifold 3*3. A three-fold rosette inside each triangle of mirrors.
Molecular point groups with their operations and character tables, the 230 space groups with a cell builder, and the 17 wallpaper and 7 frieze groups drawn live. The tool needs JavaScript, and WebGL2 for the 3D views; these are the pages it offers: