Class 3- primes (for definition see A005109).

Terms

a(0) =23a(1) =59a(2) =67a(3) =83a(4) =89a(5) =107a(6) =173a(7) =199a(8) =227a(9) =233a(10) =263a(11) =311a(12) =317a(13) =331a(14) =349a(15) =353a(16) =367a(17) =373a(18) =383a(19) =397a(20) =419a(21) =431a(22) =463a(23) =479a(24) =503a(25) =509a(26) =523a(27) =563a(28) =569a(29) =587