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 A082566 #16 May 14 2021 12:15:39 %S A082566 2,19091918181818181919091,1908080909080809090808091, %T A082566 18180808191908180919180808181,1808080818180818180818180808081, %U A082566 1808190918090818180908190918081,18080818080919081918091908081808081 %N A082566 Primes p such that p, 2p+1, 4p+3 are palindromic primes. %H A082566 H. Dubner, <a href="https://web.archive.org/web/20050406043022/http://ksc9.th.com/warut/dubner.html">Palindromic Sophie Germain Primes</a> %Y A082566 Cf. A007700. %Y A082566 Subsequence of A082520. %K A082566 base,nonn %O A082566 1,1 %A A082566 _Lekraj Beedassy_, May 06 2003 %E A082566 a(1)=2 inserted by _Dmitry Petukhov_, May 14 2021