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 A124364 #15 Jan 15 2025 16:41:53 %S A124364 2,19997,199969967,1999699669993,19996996699929961, %T A124364 199969966999299609907,1999699669992996099069973, %U A124364 19996996699929960990699729941,199969966999299609906997299409939,1999699669992996099069972994099389959,19996996699929960990699729940993899589873 %N A124364 Largest prime < 10000*a(n-1), a(1)=2. %t A124364 NestList[NextPrime[10000#,-1]&,2,10] (* _Harvey P. Dale_, Nov 07 2020 *) %Y A124364 Cf. A124262, A126031. %K A124364 nonn %O A124364 1,1 %A A124364 _Artur Jasinski_, Dec 16 2006 %E A124364 a(10)-a(11) from _Pontus von Brömssen_, Jan 15 2025