HS.2

U_{3}(5).2  352 1a^{±} + 175a^{±}  4

Character Numbers: [ 1, 2, 10, 11 ]

S_{1} S_{2}  S_{3} S_{4}
χ_{1} 1 50 126 175
χ_{2} 1 −50 −126 175
χ_{3} 1  6 −6 −1
χ_{4} 1 −6  6 −1

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