16 ≤ C(50,14,2) ≤ 18

Created by: LJCR

Method of Construction: Multiple of (25,7,2) covering

Lower Bound: Horsley, Theorem 11, r=4, d=3

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