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 A124368 #15 Jan 15 2025 16:42:03 %S A124368 2,1999993,1999992999889,1999992999888999961, %T A124368 1999992999888999960999949,1999992999888999960999948999991, %U A124368 1999992999888999960999948999990999917,1999992999888999960999948999990999916999963,1999992999888999960999948999990999916999962999947 %N A124368 Largest prime < 1000000*a(n-1), a(1)=2. %t A124368 NestList[NextPrime[1000000#,-1]&,2,10] (* _Harvey P. Dale_, Jul 21 2021 *) %Y A124368 Cf. A124262, A126031. %K A124368 nonn %O A124368 1,1 %A A124368 _Artur Jasinski_, Dec 16 2006 %E A124368 a(9) from _Pontus von Brömssen_, Jan 15 2025