lower bound = 48

C(24,4,2) = 48

Method of Construction: mills, jcta 13 (1972) pp. 55-78.

Lower Bound: Schonheim

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