10 ≤ C(25,17,4) ≤ 11

Created by: Kinski & Genivaldo Pereira

Lower Bound: Theorem 4, Todorov, JCTA 1985

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