C(40,19,2) = 7

Created by: LJCR

Method of Construction: Simple construction from (39,18,2)

Lower Bound: Schonheim

  1  2  3  4  5  6  7  8  9 21 22 23 24 25 26 27 28 29 40
  1  2  4  5 10 12 15 18 19 20 22 24 25 30 32 35 38 39 40
  1  2  7  8 10 11 13 17 18 20 21 27 28 30 31 33 37 38 40
  1  3  4  6  9 10 14 16 18 20 23 24 26 29 30 34 36 38 40
  1  7  8 10 12 14 15 16 19 21 27 28 30 32 34 35 36 39 40
  2  4  5 11 13 14 16 17 19 22 24 25 31 33 34 36 37 39 40
  3  6  9 11 12 13 15 17 19 23 26 29 31 32 33 35 37 39 40