C(17,8,2) <=7

Method of construction: lex covering

 1  2  3  4  5  6  7  8
 1  9 10 11 12 13 14 15
 2  3  4  9 10 11 16 17
 5  6  7 12 13 14 16 17
 2  3  4  8 12 13 14 15
 5  6  7  8  9 10 11 15
 1  2  3  4  8 15 16 17