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 A050263 #15 Feb 16 2025 08:32:40
%S A050263 34,204,317,322,372,472,848,868,931,1023,1141,1194,1469,1537,1753,
%T A050263 1778,1822,1868,2167,2299,2384,2421,2464,2529,2655,3028,3164,3366,
%U A050263 3470,3559,3683,3763,4104,4285,4610,4751,4752,4753,4985,4986,5154
%N A050263 Starting positions of strings of 2 8's in the decimal expansion of Pi.
%H A050263 <a href="/index/Ph#Pi314">Index entries for sequences related to the number Pi</a>
%H A050263 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PiDigits.html">Pi Digits</a>
%t A050263 q=8!;z=8;a=RealDigits[Pi,10,q];lst={};Do[b=a[[1]][[n]];c=a[[1]][[n+1]];If[b==z&&c==z,AppendTo[lst,n-1]],{n,q-1}];lst (* _Vladimir Joseph Stephan Orlovsky_, Jun 19 2009 *)
%K A050263 nonn,base
%O A050263 1,1
%A A050263 _Eric W. Weisstein_