C(30,12,2) = 9

Created by: LJCR

Method of Construction: Multiple of (10,4,2) covering

Lower Bound: Bounds for fixed number of blocks

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