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 A049523 #44 Feb 16 2025 08:32:40 %S A049523 1,25,154,1590,17535,763,710101,22931746,24658602,386980413, %T A049523 15647738229,368299898267,2164164669333,5758910552710,46970519777308 %N A049523 Smallest starting index for a run of exactly n consecutive equal digits in decimal expansion of Pi. %C A049523 Digits 3,1,4,1,5,... are indexed 1,2,3,4,5,... %C A049523 a(11) > 2*10^9. - _M. F. Hasler_, Mar 22 2017 %C A049523 a(12) > 99*10^9. - _Giovanni Resta_, Oct 02 2019 %C A049523 a(15) > 12*10^12. - _Dmitry Petukhov_, Dec 30 2019 %C A049523 a(16) > 50*10^12, a(17) = 28642224609576. - _Dmitry Petukhov_, Oct 30 2021 %H A049523 Dave Andersen, <a href="http://www.angio.net/pi/piquery">Pi-Search Page</a> %H A049523 Yasumasa Kanada, <a href="http://www.super-computing.org/pi-decimal_current.html">Statistical Distribution Information</a>, Home page, Computer Centre, The University of Tokyo. %H A049523 Timothy Mullican, <a href="https://storage.googleapis.com/pi50t/index.html">50 trillion digits of pi</a> %H A049523 PI-world Site, <a href="https://web.archive.org/web/20140130074648/http://piworld.calico.jp/epidigits.html">The digits and Statistics for 12 trillion digits of PI</a> [archived page] %H A049523 James Taylor, <a href="http://www.subidiom.com/pi/">Irrational Number Search Engine</a> %H A049523 Peter Trüb, <a href="https://pi2e.ch/blog/2017/03/10/pi-digits-download/">22.4 trillion digits of pi</a> %H A049523 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PiDigits.html">Pi Digits.</a> %H A049523 <a href="/index/Ph#Pi314">Index entries for sequences related to the number Pi</a> %e A049523 See A084144 for an example. %Y A049523 Cf. A049514, A049515, A049516, A049517, A049518, A049519, A049520, A049521, A049522. %Y A049523 Cf. A084144 (digit with this starting index). %K A049523 nonn,base,more %O A049523 1,2 %A A049523 _Harvey P. Dale_ %E A049523 More terms from _Rick L. Shepherd_, May 15 2003 %E A049523 Edited and a(10) (via Taylor's search engine) added by _M. F. Hasler_, Mar 21 2017 %E A049523 a(11) from _Giovanni Resta_, Oct 02 2019 %E A049523 a(12)-a(14) added by _Dmitry Petukhov_, Dec 30 2019 %E A049523 a(15) from _Dmitry Petukhov_, Oct 30 2021