C(26,18,4) = 10

Created by: LJCR

Method of Construction: Multiple of (13,9,4) covering

Lower Bound: Schonheim

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