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 A062222 #16 Oct 31 2019 01:23:23 %S A062222 15,39,567,2529,14337 %N A062222 Numbers k such that the smoothly undulating palindromic number (73*10^k - 37)/99 is a prime. %C A062222 Prime versus probable prime status and proofs are given in the author's table. %C A062222 No further terms < 100000. - _Ray Chandler_, Aug 17 2011 %H A062222 Patrick De Geest, <a href="http://www.worldofnumbers.com/undulat.htm#supp737">SUPP Reference Table - 737</a> %H A062222 <a href="/index/Pri#pri_supp">Index entries for sequences related to smoothly undulating palindromic primes</a> %e A062222 k=15 -> (73*10^15 - 37)/99 = 737373737373737. %Y A062222 Cf. A062209-A062232, A059758, A032758. %K A062222 nonn,base,more %O A062222 1,1 %A A062222 _Patrick De Geest_ and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001 %E A062222 Edited by _Ray Chandler_, Aug 17 2011