C(16,8,2) = 6

Method of Construction: lex covering

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