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 A113891 #6 Mar 24 2021 05:58:18 %S A113891 0,0,0,97,911 %N A113891 Smallest prime of the form: all nines followed by prime(n) with a(n) > prime(n); or 0 if no such prime exists. %C A113891 The next term is too large to include. %C A113891 The sequence continues 10^1800 - 87, 999917, 919, 9923, 929, 9931, 937, 941, 9999943, 947, 953, 999959, 99961, 967, 971, ... - _Sean A. Irvine_, Feb 21 2010 %e A113891 a(4) = 97, prime(4) = 7. %Y A113891 Cf. A113884, A114785, A113886, A113887, A085074, A114789, A114790. %K A113891 base,nonn %O A113891 1,4 %A A113891 _Amarnath Murthy_, Nov 18 2005