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 A062229 #16 Oct 31 2019 01:24:42 %S A062229 5,17,65,143,551,92981 %N A062229 Numbers k such that the smoothly undulating palindromic number (94*10^k - 49)/99 is a prime. %C A062229 Prime versus probable prime status and proofs are given in the author's table. %C A062229 No further terms < 100000. - _Ray Chandler_, Aug 17 2011 %H A062229 Patrick De Geest, <a href="http://www.worldofnumbers.com/undulat.htm#supp949">SUPP Reference Table - 949</a> %H A062229 <a href="/index/Pri#pri_supp">Index entries for sequences related to smoothly undulating palindromic primes</a> %e A062229 k=17 -> (94*10^17 - 49)/99 = 94949494949494949. %Y A062229 Cf. A062209-A062232, A059758, A032758. %K A062229 nonn,base,more %O A062229 1,1 %A A062229 _Patrick De Geest_ and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001 %E A062229 a(6) from _Ray Chandler_, Jul 29 2011 %E A062229 Edited by _Ray Chandler_, Aug 17 2011