7 0.7763671875 0.6455078125 0.447265625 0.697265625
11 0.3369140625 0.5234375 0.673828125 0.93359375
17 0.5 0.5537109375 1 0.892578125
19 0.2587890625 0.02734375 0.224609375 0.046875