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 A124267 #11 Dec 15 2024 14:34:26 %S A124267 5,47,467,4663,46619,466183,4661819,46618183,466181801,4661818009, %T A124267 46618180033,466181800327,4661818003217,46618180032161, %U A124267 466181800321609,4661818003216081,46618180032160669,466181800321606627,4661818003216066183,46618180032160661801,466181800321606617917 %N A124267 Largest prime < 10*a(n-1), a(1)=5. %H A124267 Vincenzo Librandi, <a href="/A124267/b124267.txt">Table of n, a(n) for n = 1..200</a> %t A124267 NestList[NextPrime[10 #, - 1]&, 5, 30] (* _Vincenzo Librandi_, Jun 28 2014 *) %Y A124267 Cf. A124262. %K A124267 nonn %O A124267 1,1 %A A124267 _Artur Jasinski_, Dec 16 2006