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 A083619 #24 Feb 16 2025 08:32:49
%S A083619 17893953,22931745,22931746,23189751,23724968,26621347,48484522,
%T A083619 65122865,65122866,101281206,114016129,139676210,143452823,158136797,
%U A083619 162805048,180943775,183739324,187015739,193053713,195259463,199439192
%N A083619 Starting positions of strings of seven 4's in the decimal expansion of Pi.
%C A083619 The digits 3,1,4,... of Pi are indexed by 0,1,2,...
%C A083619 Consecutive numbers indicate a string of more than seven '4's in a row, e.g., at positions 22931745, 65122865, 221749424, 351988052, ... start runs of eight '4's. - _M. F. Hasler_, Mar 21 2017
%H A083619 Dave Andersen, <a href="http://www.angio.net/pi/piquery">Pi-Search Page</a>
%H A083619 James Taylor, <a href="http://www.subidiom.com/pi/">Irrational Number Search Engine</a>
%H A083619 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PiDigits.html">Pi Digits.</a>
%H A083619 <a href="/index/Ph#Pi314">Index entries for sequences related to the number Pi</a>
%t A083619 SequencePosition[RealDigits[Pi,10,2*10^8][[1]],{4,4,4,4,4,4,4}][[All,1]]-1 (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Mar 05 2020 *)
%Y A083619 Cf. A083618 (six 4's).
%K A083619 base,nonn
%O A083619 1,1
%A A083619 _Rick L. Shepherd_, May 02 2003
%E A083619 More terms from _Rick L. Shepherd_, Aug 06 2006