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 A083641 #20 Feb 16 2025 08:32:49
%S A083641 4722613,7820866,19921876,33359983,34287075,37855734,46663520,
%T A083641 46663521,46663522,79749698,118999021,142570810,152776258,175699219,
%U A083641 179246855,185196729,206426208,239798471,239798472,250968396,261513905,269167637,269671298,271471279,278530910
%N A083641 Starting positions of strings of seven 8's in the decimal expansion of Pi.
%H A083641 Dave Andersen, <a href="http://www.angio.net/pi/piquery">Pi-Search Page</a>
%H A083641 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PiDigits.html">Pi Digits.</a>
%H A083641 <a href="/index/Ph#Pi314">Index entries for sequences related to the number Pi</a>
%t A083641 SequencePosition[RealDigits[Pi,10,19*10^7][[1]],{8,8,8,8,8,8,8}][[All,1]]-1 (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Aug 25 2016 *)
%Y A083641 Cf. A083640 (six 8's).
%K A083641 nonn,base
%O A083641 1,1
%A A083641 _Rick L. Shepherd_, May 05 2003
%E A083641 More terms from _Rick L. Shepherd_, Aug 07 2006
%E A083641 More terms from _Jinyuan Wang_, Mar 01 2020