transitive_group_id: [18,491]

 Description: ((C9 : C3) x (C9 : C3)) : D4 

 Stabilizer: C6 x (C9 : C6) 

Density: 1

Join: True 

Spectrum: [(1, 2592), (4, 288), (7, 576), (40, 96), (-2516, 1), (-20, 288), (400, 6), (49, 32), (-14, 192), (3316, 1), (-140, 32), (-2, 1728)]