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 A124361 #15 Jan 15 2025 16:42:15 %S A124361 2,1999,1998991,1998990991,1998990990979,1998990990978973, %T A124361 1998990990978972953,1998990990978972952981,1998990990978972952980973, %U A124361 1998990990978972952980972937,1998990990978972952980972936953,1998990990978972952980972936952943,1998990990978972952980972936952942969 %N A124361 Largest prime < 1000*a(n-1), a(1)=2. %t A124361 NestList[NextPrime[1000#,-1]&,2,11] (* _Harvey P. Dale_, Feb 07 2011 *) %Y A124361 Cf. A124262, A126031. %K A124361 nonn %O A124361 1,1 %A A124361 _Artur Jasinski_, Dec 16 2006 %E A124361 a(12)-a(13) from _Pontus von Brömssen_, Jan 15 2025