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 A366831 #17 Dec 17 2023 11:21:07 %S A366831 1,50,576,242424,746074,10311073,54848721,103849853,48438192357 %N A366831 Self-locating strings within Pi: numbers n such that the reverse string n starts at position n in the decimal digits of Pi, where leading 3 is omitted. %e A366831 50 is a term because '05' starts at position 50, %e A366831 576 is a term because '675' starts at position 576: %e A366831 Position 1 2 3 ... 50 51 ... 576 577 578 ... %e A366831 Pi (3 omitted) 1 4 1 ... 0 5 ... 6 7 5 ... %Y A366831 Cf. A057679, A057680, A366830. %K A366831 nonn,base,more %O A366831 1,2 %A A366831 _J. Volkmar Schmidt_, Oct 31 2023