C(31,23,4) = 8
Created by: LJCR
Method of Construction: Simple construction from (30,22,4)
Lower Bound: Mills, Covering Designs I, 1979
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 22 23 24 25 26 31
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1 2 3 4 5 6 7 8 9 10 11 12 17 18 19 20 21 26 27 28 29 30 31
1 2 3 4 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
5 6 7 8 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
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