#The collapsed adjacency matrices were computed by C. E. Praeger and L. H. Soicher. mats:=[ [ [ 1, 0, 0 ], [ 0, 1, 0 ], [ 0, 0, 1 ] ], [ [ 0, 31671, 0 ], [ 1, 3510, 28160 ], [ 0, 3240, 28431 ] ], [ [ 0, 0, 275264 ], [ 0, 28160, 247104 ], [ 1, 28431, 246832 ] ] ];