M_{24}

M_{22}.2  276 1a + 23a + 252a  3

Character Numbers: [ 1, 2, 7 ]

S_{1} S_{2} S_{3}
χ_{1} 1 44 231
χ_{2} 1 20 −21
χ_{3} 1 −2  1

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