C(30,11,2) = 11

Method of Construction: mills, ars combinatoria, 8 (1979) pg. 270

Lower Bound: Bounds for fixed number of blocks

  1  2  3  4  5  6  7  8  9 10 30
  1 11 12 13 14 17 18 19 20 21 22
  1 15 16 23 24 25 26 27 28 29 30
  2 11 12 13 14 23 24 25 26 27 28
  2 15 16 17 18 19 20 21 22 29 30
  3  4  5  6 11 12 13 14 15 16 29
  3  4  5  6 17 18 19 23 24 25 30
  3  4  5  6 20 21 22 26 27 28 30
  7  8  9 10 11 12 13 14 15 16 30
  7  8  9 10 17 18 19 26 27 28 29
  7  8  9 10 20 21 22 23 24 25 30