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 A050222 #19 Feb 16 2025 08:32:40
%S A050222 24,215,230,282,364,401,503,507,831,875,1032,1127,1302,1353,1667,1686,
%T A050222 1698,1699,1986,2568,2841,3175,3289,3488,3583,3620,3702,3719,3833,
%U A050222 3918,4101,4265,4325,4594,4623,4689,4814,4928,4929,5211,5269,5398
%N A050222 Starting positions of strings of 2 3's in the decimal expansion of Pi.
%C A050222 Starting positions are counted from and after the decimal point. _Harvey P. Dale_, Mar 09 2022
%H A050222 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PiDigits.html">Pi Digits</a>
%H A050222 <a href="/index/Ph#Pi314">Index entries for sequences related to the number Pi</a>
%t A050222 q=3;a=RealDigits[Pi,10,2*7! ];lst={};Do[b=a[[1]][[n]];c=a[[1]][[n+1]];If[b==q&&c==q,AppendTo[lst,n-1]],{n,2*7!-1}];lst (* _Vladimir Joseph Stephan Orlovsky_, Jun 07 2009 *)
%t A050222 SequencePosition[RealDigits[Pi,10,6000][[1]],{3,3}][[All,1]]-1 (* _Harvey P. Dale_, Mar 09 2022 *)
%Y A050222 Cf. A000796.
%K A050222 nonn,base
%O A050222 1,1
%A A050222 _Eric W. Weisstein_