Safe primes (A005385) (p and (p-1)/2 are primes) such that 12*p+1 is also prime.

Terms

a(0) =5a(1) =23a(2) =59a(3) =83a(4) =383a(5) =479a(6) =503a(7) =719a(8) =839a(9) =863a(10) =1619a(11) =2039a(12) =2099a(13) =2579a(14) =2819a(15) =2879a(16) =3023a(17) =4139a(18) =4259a(19) =4679a(20) =4703a(21) =4919a(22) =5879a(23) =6719a(24) =6779a(25) =7559a(26) =8039a(27) =8783a(28) =8819a(29) =10799