I got 3 states...
Given is 4
finally we got S->aa/Saaa
please correct me if i am wrong
Gurdeep Saini L=aa+aaa(aa)+
by this language ( 7 times a) also accepted according to u but i am not able to find any string of 7 length
now check again
Gurdeep Saini hmm now i think we can accept sequences 2,5,8,11 so from my view it is correct