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 A062211 #19 Aug 11 2024 14:41:34 %S A062211 3,15,63,89,245,583,1791,2123,7233,24787,44653 %N A062211 Numbers k such that the smoothly undulating palindromic number (15*10^k - 51)/99 is a prime. %C A062211 Prime versus probable prime status and proofs are given in the author's table. %C A062211 No further terms < 100000. - _Ray Chandler_, Aug 17 2011 %H A062211 P. De Geest, <a href="https://www.worldofnumbers.com/undulat.htm#supp151">SUPP Reference Table - 151</a> %H A062211 <a href="/index/Pri#pri_supp">Index entries for sequences related to smoothly undulating palindromic primes</a> %e A062211 k=15 -> (15*10^15 - 51)/99 = 151515151515151. %Y A062211 Cf. A062209-A062232, A059758, A032758. %K A062211 nonn,base %O A062211 1,1 %A A062211 _Patrick De Geest_ and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001 %E A062211 a(11)=44653 from _Ray Chandler_, Nov 11 2010 %E A062211 Edited by _Ray Chandler_, Aug 17 2011