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 A062226 #22 Oct 31 2019 01:24:12 %S A062226 3,357,537,1677,3057,51663,66447 %N A062226 Numbers k such that the smoothly undulating palindromic number (79*10^k - 97)/99 is a prime. %C A062226 Prime versus probable prime status and proofs are given in the author's table. %C A062226 No further terms < 100000. - _Ray Chandler_, Aug 17 2011 %H A062226 Patrick De Geest, <a href="http://www.worldofnumbers.com/undulat.htm#supp797">SUPP Reference Table - 797</a> %H A062226 <a href="/index/Pri#pri_supp">Index entries for sequences related to smoothly undulating palindromic primes</a> %e A062226 k=357 -> (79*10^357 - 97)/99 = 7979797...7979797. %Y A062226 Cf. A062209-A062232, A059758, A032758. %K A062226 nonn,base,more %O A062226 1,1 %A A062226 _Patrick De Geest_ and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001 %E A062226 a(6)=51663 from _Ray Chandler_, Nov 11 2010 %E A062226 a(7)=66447 from _Ray Chandler_, Jan 30 2011 %E A062226 Edited by _Ray Chandler_, Aug 17 2011