This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A348370 #13 Dec 10 2023 14:28:56 %S A348370 1,2,3,4,5,12,21,86,235,8114118,535252535 %N A348370 Numbers k such that pi(reversal(prime(k))) = reversal(k). Ignore leading 0's. %C A348370 535252535 is a term (not necessarily the next one), so it seems this sequence is a supersequence of A069469. %C A348370 From _Martin Ehrenstein_, Nov 06 2021: (Start) %C A348370 Equivalently: Numbers k such that prime(reversal(k)) <= reversal(prime(k)) < prime(reversal(k)+1). Ignore leading 0's. %C A348370 Thus A069469 is indeed a subsequence. %C A348370 a(12) > 10^10. (End) %t A348370 Select[Range[300],PrimePi[IntegerReverse[Prime[#]]]==IntegerReverse[#]&] %Y A348370 Cf. A000040, A000720, A004086, A069469. %K A348370 nonn,base,more %O A348370 1,2 %A A348370 _Ivan N. Ianakiev_, Oct 15 2021 %E A348370 a(11) verified by _Martin Ehrenstein_, Nov 06 2021