13 ≤ C(33,21,4) ≤ 17

Created by: LJCR

Method of Construction: Multiple of (11,7,4) covering

Lower Bound: Schonheim

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