Primes of the form 2*p+1 where p is prime and p+1 is squarefree.

Terms

a(0) =5a(1) =11a(2) =59a(3) =83a(4) =227a(5) =347a(6) =563a(7) =1019a(8) =1283a(9) =1307a(10) =1523a(11) =2459a(12) =2579a(13) =2819a(14) =2963a(15) =3803a(16) =3947a(17) =4259a(18) =4547a(19) =5387a(20) =5483a(21) =6779a(22) =6827a(23) =7187a(24) =8147a(25) =9587a(26) =10667a(27) =10883a(28) =11003a(29) =12107