18 ≤ C(41,11,2) ≤ 19

Created by: Jan de Heer and Steve Muir

Method of Construction: Private tools

Lower Bound: Horsley, Theorem 1, r=4, d=0

  1  2  6  7  8 15 26 29 30 31 37
  1  3 10 13 14 25 29 30 38 40 41
  1  4 11 12 17 20 27 29 30 33 36
  1  5 12 16 18 24 25 29 30 32 34
  1  9 19 21 22 23 28 29 30 35 39
  2  3  4 13 19 21 27 31 32 38 39
  2  4  5  9 16 17 27 28 31 34 40
  2  5 10 11 12 14 22 23 31 35 41
  2  9 14 18 20 24 25 28 31 33 36
  3  5  6  7 13 20 26 33 34 36 38
  3  8  9 11 12 13 15 28 34 37 38
  3 13 16 17 18 22 23 24 34 35 38
  4  6  7 10 16 22 23 25 26 27 35
  4  8 10 14 15 18 24 25 27 37 41
  5  8 11 15 16 17 19 21 25 37 39
  6  7  9 10 11 14 17 26 28 32 41
  6  7 11 12 18 19 21 24 26 39 40
  8 15 20 22 23 32 33 35 36 37 40
 10 14 16 19 20 21 33 34 36 39 41