C(13,11,5) = 6

Method of Construction: lex covering

Lower Bound: Schonheim

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