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 A062212 #24 Aug 11 2024 14:41:34 %S A062212 7,55,109,145,229,961 %N A062212 Numbers k such that the smoothly undulating palindromic number (16*10^k - 61)/99 is a prime. %C A062212 Prime versus probable prime status and proofs are given in the author's table. %C A062212 No further terms < 100000. - _Ray Chandler_, Aug 17 2011 %H A062212 P. De Geest, <a href="https://www.worldofnumbers.com/undulat.htm#supp161">SUPP Reference Table - 161</a> %H A062212 <a href="/index/Pri#pri_supp">Index entries for sequences related to smoothly undulating palindromic primes</a> %e A062212 k=7 -> (16*10^7 - 61)/99 = 1616161. %Y A062212 Cf. A062209-A062232, A059758, A032758. %K A062212 nonn,base %O A062212 1,1 %A A062212 _Patrick De Geest_ and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001 %E A062212 Edited by _Ray Chandler_, Aug 17 2011