The maximal graphs are:

1

0 1 0 0 0 0 1 0 
1 0 1 0 0 0 0 0 
0 1 0 1 0 0 0 0 
0 0 1 0 1 0 0 0 
0 0 0 1 0 1 0 0 
0 0 0 0 1 0 0 1 
1 0 0 0 0 0 0 1 
0 0 0 0 0 1 1 0 


[-2,-1.41421,-1.41421,0,0,1.41421,1.41421,2]



2

0 1 0 0 0 0 1 1 
1 0 1 0 0 0 0 0 
0 1 0 1 0 0 0 0 
0 0 1 0 1 0 0 0 
0 0 0 1 0 1 0 1 
0 0 0 0 1 0 0 1 
1 0 0 0 0 0 0 1 
1 0 0 0 1 1 1 0 


[-2,-1.41421,-1.41421,-0.732051,0,1.41421,1.41421,2.73205]



3

0 1 0 0 0 0 0 
1 0 1 0 0 0 0 
0 1 0 1 0 0 0 
0 0 1 0 1 0 1 
0 0 0 1 0 1 0 
0 0 0 0 1 0 1 
0 0 0 1 0 1 0 


[-2.1889,-1.41421,-0.45685,0,0.45685,1.41421,2.1889]



4

0 1 0 0 0 0 0 
1 0 1 0 0 0 1 
0 1 0 1 0 0 0 
0 0 1 0 1 0 0 
0 0 0 1 0 1 0 
0 0 0 0 1 0 0 
0 1 0 0 0 0 0 


[-1.93185,-1.41421,-0.517638,0,0.517638,1.41421,1.93185]

