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 A083612 #18 Feb 16 2025 08:32:49 %S A083612 28467,89085,146043,335792,680738,710100,710101,710102,899654,987207, %T A083612 1108406,1129019,1129020,1135766,1321501,1454595,1961784,2305499, %U A083612 2384621,2403869,2607453,2657509,2756644,2872302,2961123,3079956,3155439,3204765,3204766,3204767,3209586 %N A083612 Starting positions of strings of five 3's in the decimal expansion of Pi. %H A083612 Dave Andersen, <a href="http://www.angio.net/pi/piquery">Pi-Search Page</a> %H A083612 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PiDigits.html">Pi Digits.</a> %H A083612 <a href="/index/Ph#Pi314">Index entries for sequences related to the number Pi</a> %t A083612 Transpose[StringPosition[StringDrop[ToString[N[Pi,10! ]],2],"33333"]][[1]] (* _Vladimir Joseph Stephan Orlovsky_, Jun 19 2009 *) %Y A083612 Cf. A083611 (four 3's), A083613 (six 3's). %K A083612 nonn,base %O A083612 1,1 %A A083612 _Rick L. Shepherd_, May 01 2003 %E A083612 More terms from _Jinyuan Wang_, Feb 29 2020