Primes of form 10n+3.

Terms

a(0) =3a(1) =13a(2) =23a(3) =43a(4) =53a(5) =73a(6) =83a(7) =103a(8) =113a(9) =163a(10) =173a(11) =193a(12) =223a(13) =233a(14) =263a(15) =283a(16) =293a(17) =313a(18) =353a(19) =373a(20) =383a(21) =433a(22) =443a(23) =463a(24) =503a(25) =523a(26) =563a(27) =593a(28) =613a(29) =643