12 ≤ C(38,20,3) ≤ 14

Created by: LJCR

Method of Construction: Multiple of (19,10,3) covering

Lower Bound: Schonheim

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