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 A083613 #17 Feb 16 2025 08:32:49 %S A083613 710100,710101,1129019,3204765,3204766,4098542,4640063,5524958, %T A083613 9831707,10985154,12376276,12469058,12469059,13230524,13247803, %U A083613 15239977,18216168,18216169,19175682,19175683,22562616,23375381,24287401,25841185,27090294,28715870,29796271,29956363 %N A083613 Starting positions of strings of six 3's in the decimal expansion of Pi. %H A083613 Dave Andersen, <a href="http://www.angio.net/pi/piquery">Pi-Search Page</a> %H A083613 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PiDigits.html">Pi Digits.</a> %H A083613 <a href="/index/Ph#Pi314">Index entries for sequences related to the number Pi</a> %Y A083613 Cf. A083612 (five 3's), A083614 (seven 3's). %K A083613 nonn,base %O A083613 1,1 %A A083613 _Rick L. Shepherd_, May 01 2003 %E A083613 More terms from _Jinyuan Wang_, Feb 29 2020