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 A065829 #13 Jul 02 2022 12:13:43
%S A065829 1,11,110,1101,11011,110111,1101110,11011100,110111000,1101110001,
%T A065829 11011100010,110111000100,1101110001000,11011100010001,
%U A065829 110111000100011,1101110001000110,11011100010001101,110111000100011010,1101110001000110101,11011100010001101010,110111000100011010100
%N A065829 String formed from first n binary digits found in decimal expansion of Pi.
%H A065829 Harvey P. Dale, <a href="/A065829/b065829.txt">Table of n, a(n) for n = 1..1000</a>
%t A065829 FromDigits/@Module[{bd=DeleteCases[RealDigits[Pi,10,200][[1]],_?(#>1&)]},Table[ Take[ bd,n],{n,Length[bd]}]] (* _Harvey P. Dale_, Jul 02 2022 *)
%Y A065829 Cf. A000796, A011545, A011546, A055143, A065828-A065840.
%K A065829 nonn,base
%O A065829 1,2
%A A065829 _Patrick De Geest_, Nov 24 2001
%E A065829 Offset changed to 1 and more terms from _Jinyuan Wang_, Aug 31 2021