C(27,13,3) = 15
Method of Construction: simple construction: induced on c(28,14,4) covering
Lower Bound: Schonheim
1 3 5 10 12 14 16 17 21 22 24 25 27
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2 6 8 9 13 14 15 16 20 21 25 26 27
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1 4 5 8 11 12 13 15 17 20 21 23 27
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2 5 7 11 15 16 17 18 20 22 24 25 26
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4 5 6 8 9 13 17 18 19 22 23 24 25
1 3 6 7 8 9 10 11 12 13 16 17 25
2 3 4 6 9 10 11 21 22 23 24 26 27
2 3 4 5 7 8 10 13 14 16 17 23 26
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