Smallest palindromic prime with digit sum = n, or 0 if no such prime exists.

Terms

a(0) =0a(1) =2a(2) =3a(3) =0a(4) =5a(5) =0a(6) =7a(7) =10601a(8) =0a(9) =181a(10) =191a(11) =0a(12) =373a(13) =383a(14) =0a(15) =727a(16) =13931a(17) =0a(18) =757a(19) =929a(20) =0a(21) =787a(22) =797a(23) =0a(24) =17971a(25) =39293a(26) =0a(27) =19891a(28) =19991a(29) =0