Palindromic primes with digit sum = 50.

Terms

a(0) =3998993a(1) =7696967a(2) =7778777a(3) =7794977a(4) =7868687a(5) =7884887a(6) =7958597a(7) =9586859a(8) =9758579a(9) =9782879a(10) =9938399a(11) =138989831a(12) =139969931a(13) =148888841a(14) =148969841a(15) =157888751a(16) =159929951a(17) =166888661a(18) =167787761a(19) =168929861a(20) =169666961a(21) =174989471