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 A134998 #15 Apr 03 2023 10:36:11 %S A134998 2,5,11,101,181,18181,1008001,1022201,1055501,1082801,1085801,1180811, %T A134998 1208021,1221221,1250521,1280821,1508051,1520251,1551551,1580851, %U A134998 1802081,1805081,1880881,1881881,100111001,100888001,108101801 %N A134998 Dihedral palindromic primes. %H A134998 C. K. Caldwell, The Prime Glossary, <a href="https://t5k.org/glossary/page.php?sort=DihedralPrime">Dihedral Prime</a> %H A134998 C. Rivera, <a href="http://www.primepuzzles.net/puzzles/puzz_039.htm">Source</a> %Y A134998 Cf. A134996, A134997. %K A134998 nonn,base %O A134998 1,1 %A A134998 _Felice Russo_ %E A134998 5 added by _Patrick Capelle_, Feb 06 2008