14 ≤ C(53,16,2) ≤ 15

Created by: Jan de Heer and Steve Muir

Method of Construction: Private tools

Lower Bound: Schonheim

  1  2  4  8 11 12 13 22 27 34 37 38 40 41 42 45
  1  3  9 13 15 18 24 32 34 36 41 43 46 48 50 53
  1  5  7 14 16 17 19 23 28 32 34 39 41 47 49 52
  1  6 10 20 21 25 26 29 30 31 33 34 35 41 44 51
  2  3  5 11 17 20 25 29 30 33 36 40 44 46 47 51
  2  6  7  9 10 11 16 19 23 24 32 35 39 40 48 49
  2 11 13 14 15 18 21 25 26 28 31 40 43 50 52 53
  3  4  6  8 10 14 18 27 28 35 36 37 42 45 46 52
  3  7 12 16 19 21 22 23 26 31 32 36 38 39 46 49
  4  5  8  9 17 21 24 26 27 31 37 42 45 47 48 53
  4  7  8 15 16 19 23 25 27 31 37 42 43 45 49 50
  4  8 20 25 27 29 30 32 33 37 39 42 44 45 50 51
  5  6 10 12 13 15 17 18 22 35 38 39 43 47 50 53
  7 13 15 16 18 19 20 23 29 30 33 43 44 49 51 53
  9 12 14 20 22 24 25 28 29 30 33 38 44 48 51 52