Co_{3}

2.S_{6}(2) 170775 {1a + 275a + 7084a + 8855a + 23000a + \atop 57960a + 73600a} 7

Character Numbers: [ 1, 5, 14, 15, 20, 27, 29 ]

S_{1} S_{2}  S_{3}  S_{4}  S_{5}  S_{6}  S_{7}
χ_{1} 1 630 1920 8960 30240 48384 80640
χ_{2} 1 147 −288 1232 1260 2016 −4368
χ_{3} 1 −45 120 −40 540 −216 −360
χ_{4} 1 75  0  80 180 −576  240
χ_{5} 1  3  72 116 −252  72 −12
χ_{6} 1 15  0 −100  0 144 −60
χ_{7} 1 −18 −33  32  0 −54  72

Ramanujan Graphs: [ 2, 3, 4, 5, 6, 7 ], [ 2, 4, 5, 6, 7 ], [ 3, 4, 5, 6, 7 ], [ 4, 5, 6, 7 ]