C(28,20,3) = 5

Created by: LJCR

Method of Construction: Multiple of (14,10,3) covering

Lower Bound: Schonheim

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