15 ≤ C(32,20,4) ≤ 18

Created by: LJCR

Method of Construction: Multiple of (16,10,4) covering

Lower Bound: Schonheim

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