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(4, 18, 2) ALL distance distributions for EXTERNAL point
(2, 18, 2) has 0 possible DDs: {}
(3, 18, 2) has 1 possible DDs: {[0, 6, 6, 6]}
(4, 18, 2) has 5 possible DDs: {[0, 0, 12, 0, 6], [0, 1, 9, 3, 5], [0, 2, 6, 6, 4], [0, 3, 3, 9, 3], [0, 4, 0, 12, 2]}