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 A062228 #14 Oct 31 2019 01:24:34 %S A062228 3,9,195,515,857,11393 %N A062228 Numbers k such that the smoothly undulating palindromic number (92*10^k - 29)/99 is a prime. %C A062228 Prime versus probable prime status and proofs are given in the author's table. %C A062228 No further terms < 100000. - _Ray Chandler_, Aug 17 2011 %H A062228 Patrick De Geest, <a href="http://www.worldofnumbers.com/undulat.htm#supp929">SUPP Reference Table - 929</a> %H A062228 <a href="/index/Pri#pri_supp">Index entries for sequences related to smoothly undulating palindromic primes</a> %e A062228 k=9 -> (92*10^9 - 29)/99 = 929292929. %Y A062228 Cf. A062209-A062232, A059758, A032758. %K A062228 nonn,base,more %O A062228 1,1 %A A062228 _Patrick De Geest_ and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001 %E A062228 Edited by _Ray Chandler_, Aug 17 2011