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 A062213 #19 Aug 11 2024 14:41:34 %S A062213 31,37,4885 %N A062213 Numbers k such that the smoothly undulating palindromic number (17*10^k - 71)/99 is a prime. %C A062213 Prime versus probable prime status and proofs are given in the author's table. %C A062213 No further terms < 100000. - _Ray Chandler_, Aug 17 2011 %H A062213 P. De Geest, <a href="https://www.worldofnumbers.com/undulat.htm#supp171">SUPP Reference Table - 171</a> %H A062213 <a href="/index/Pri#pri_supp">Index entries for sequences related to smoothly undulating palindromic primes</a> %e A062213 k=31 -> (17*10^31 - 71)/99 = 1717171717171717171717171717171. %Y A062213 Cf. A062209-A062232, A059758, A032758. %K A062213 nonn,bref,base %O A062213 1,1 %A A062213 _Patrick De Geest_ and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001 %E A062213 Edited by _Ray Chandler_, Aug 17 2011