Primes remaining primes under map 2<=>9 (interchange of decimal digits 2 and 9).

Terms

a(0) =2293a(1) =2393a(2) =2591a(3) =2693a(4) =2791a(5) =2903a(6) =2957a(7) =5297a(8) =5927a(9) =7297a(10) =7927a(11) =8293a(12) =8923a(13) =9203a(14) =9257a(15) =9323a(16) =9521a(17) =9623a(18) =9721a(19) =9923a(20) =12491a(21) =12497a(22) =12907a(23) =12911a(24) =12967a(25) =12973a(26) =13291a(27) =13921a(28) =14293a(29) =14923