J_{2}.2

{U_{3}(3)  ≤ \atop U_{3}(3).2} 200 1a^{±} + 36a^{±} + 63a^{±}  6

Character Numbers: [ 1, 2, 5, 6, 7, 8 ]

S_{1} S_{2} S_{3} S_{4} S_{5} S_{6}
χ_{1} 1 1 36 36 63 63
χ_{2} 1 −1 −36 36 −63 63
χ_{3} 1 1  6 6 −7 −7
χ_{4} 1 −1 −6 6  7 −7
χ_{5} 1 1 −4 −4  3 3
χ_{6} 1 −1  4 −4 −3 3

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