C(16,13,4) = 5

Method of Construction: lex covering

Lower Bound: Schonheim

  1  2  3  4  5  6  7  8  9 10 11 12 13
  1  2  3  4  5  6  7  8  9 10 14 15 16
  1  2  3  4  5  6  7 11 12 13 14 15 16
  1  2  3  4  8  9 10 11 12 13 14 15 16
  1  5  6  7  8  9 10 11 12 13 14 15 16