C(13,9,3) = 6
Method of Construction: simple construction: added element to c(v-1,k-1,t) covering
Lower Bound: Bounds for fixed number of blocks
2 3 4 5 6 7 8 9 13
2 3 4 5 6 7 10 11 13
1 2 3 4 5 6 7 12 13
1 2 3 8 9 10 11 12 13
1 4 5 8 9 10 11 12 13
1 6 7 8 9 10 11 12 13