Sophie Germain type primes where 7*Prime[n]=2*Prime[m]+1.

Terms

a(0) =17a(1) =59a(2) =101a(3) =311a(4) =353a(5) =479a(6) =521a(7) =941a(8) =983a(9) =1109a(10) =1361a(11) =1571a(12) =1613a(13) =1823a(14) =1949a(15) =2243a(16) =2663a(17) =2789a(18) =2999a(19) =3083a(20) =3251a(21) =3671a(22) =3881a(23) =4133a(24) =4259a(25) =4931a(26) =5939a(27) =5981a(28) =6569a(29) =6653