15 ≤ C(52,15,2) ≤ 17

Created by: Michael Dambmann

Method of Construction: Simulated Annealing

Lower Bound: Horsley, Theorem 11, r=4, d=5

  1  2 14 18 20 22 23 24 30 37 41 42 45 47 51
  1  3 11 12 13 15 18 24 26 31 32 39 43 46 48
  1  4 10 17 18 21 22 24 25 34 35 37 38 40 44
  1  5  6  7  9 15 16 18 24 26 28 31 37 39 46
  1  8 18 19 20 22 24 27 29 33 36 37 49 50 52
  2  3  4  5  8 13 16 27 28 36 40 44 50 51 52
  2  6  7  9 11 12 19 21 25 32 37 43 48 49 51
  2 10 15 17 22 26 29 31 33 34 35 38 39 46 51
  3  4  6  7  9 10 13 20 22 34 37 40 41 44 52
  3  5  8 10 13 16 17 19 23 28 30 34 35 38 49
  3  5 13 14 16 21 25 28 29 33 41 42 45 47 52
  4  6  7  9 11 12 23 29 30 32 33 40 43 44 48
  4 14 15 19 26 31 39 40 41 42 44 45 46 47 49
  5  8 11 12 16 17 20 22 28 32 35 38 43 48 52
  6  7  8  9 14 17 27 35 36 38 41 42 45 47 50
  8 15 20 21 23 25 26 27 30 31 36 39 46 50 52
 10 11 12 14 27 32 34 36 41 42 43 45 47 48 50