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 A124336 #11 Dec 15 2024 15:46:27 %S A124336 23,229,2287,22861,228601,2285981,22859783,228597829,2285978263, %T A124336 22859782619,228597826159,2285978261587,22859782615849, %U A124336 228597826158469,2285978261584687,22859782615846861,228597826158468593,2285978261584685869,22859782615846858687,228597826158468586843 %N A124336 Largest prime < 10*a(n-1), a(1)=23. %H A124336 Vincenzo Librandi, <a href="/A124336/b124336.txt">Table of n, a(n) for n = 1..200</a> %t A124336 NestList[NextPrime[10 #, -1] &, 23, 30] (* _Vincenzo Librandi_, Jun 28 2014 *) %Y A124336 Cf. A124262. %K A124336 nonn %O A124336 1,1 %A A124336 _Artur Jasinski_, Dec 16 2006