C(10,5,4) = 51

Method of Construction: random greedy covering

Lower Bound: Applegate Rains and Sloane; 2002

  1  3  4  8  9
  1  2  4  6  8
  2  3  5  7  9
  1  4  5  9 10
  2  3  4  6  9
  1  3  7  9 10
  3  6  7  8  9
  1  2  3  5  8
  4  5  6  7 10
  3  4  5  8 10
  4  5  6  8  9
  2  4  7  8  9
  1  2  5  6  7
  1  6  8  9 10
  1  4  5  7  8
  2  3  5  6 10
  1  3  4  5  6
  2  3  8  9 10
  2  5  7  8 10
  2  6  7  9 10
  1  2  4  7 10
  1  4  6  7  9
  1  2  4  5  9
  3  5  6  7  8
  1  2  7  8  9
  2  3  6  7  8
  3  4  6  7  8
  1  3  4  6 10
  1  5  6  8 10
  4  7  8  9 10
  1  2  3  6  9
  3  5  6  9 10
  1  3  6  7  8
  2  3  4  7 10
  2  5  6  8  9
  2  4  6  8 10
  1  3  5  7 10
  3  6  7  8 10
  3  4  5  7  9
  1  5  6  7  9
  1  2  3  8 10
  2  4  5  9 10
  2  3  4  5  8
  5  7  8  9 10
  1  3  5  8  9
  2  4  5  6  7
  1  2  3  4  7
  3  4  6  9 10
  1  2  6  7 10
  1  2  5  9 10
  1  4  7  8 10