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 A383404 #19 May 12 2025 17:23:42 %S A383404 11,1618033308161, %T A383404 16180339887498948482045868343656381118365634386854028484989478893308161, %U A383404 16180339887498948482045868343656381177203030277118365634386854028484989478893308161 %N A383404 Palindromic primes formed from the reflected decimal expansion of the golden ratio phi. %C A383404 Primes in A135700. %C A383404 Terms with an odd number of digits are the primes in A135699. %H A383404 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PalindromicPrime.html">Palindromic Prime</a> %Y A383404 Cf. A001622, A002113, A002385, A039954, A135699, A135700. %K A383404 base,nonn %O A383404 1,1 %A A383404 _Omar E. Pol_, May 06 2025