Fractal palindromic primes of first order.

Terms

a(0) =313a(1) =353a(2) =373a(3) =383a(4) =727a(5) =757a(6) =787a(7) =797a(8) =11311a(9) =11411a(10) =1311131a(11) =1317131a(12) =1513151a(13) =1917191a(14) =9196919a(15) =9199919a(16) =10301110301a(17) =10301910301a(18) =10501210501a(19) =10501910501a(20) =10601110601a(21) =12421212421a(22) =12421812421a(23) =12721612721a(24) =13331113331a(25) =13331713331a(26) =13831913831a(27) =13931413931