Subset of Sophie Germain primes generated by an iterative process starting from 11.

Terms

a(0) =11a(1) =23a(2) =83a(3) =179a(4) =359a(5) =719a(6) =1439a(7) =2903a(8) =5903a(9) =11831a(10) =23819a(11) =47639a(12) =95723a(13) =191459a(14) =383219a(15) =766763a(16) =1533599a(17) =3067511a(18) =6135023a(19) =12271019a(20) =24542351a(21) =49085819a(22) =98172131a(23) =196344719a(24) =392689439a(25) =785379359a(26) =1570758719a(27) =3141519443