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 A084145 #24 Feb 16 2025 08:32:49 %S A084145 3,3,1,9,9,9,3,4,7,6,1,7,8,9,6,6,6 %N A084145 First digit occurring consecutively at least n times in Pi's decimal expansion. %C A084145 A simple variation on this sequence could ignore the 3 before the decimal point, making a(1)=1 instead. %H A084145 Dave Andersen, <a href="http://www.angio.net/pi/piquery">Pi-Search Page</a> %H A084145 Timothy Mullican, <a href="https://storage.googleapis.com/pi50t/index.html">50 trillion digits of pi</a> %H A084145 Peter Trüb, <a href="https://pi2e.ch/blog/2017/03/10/pi-digits-download/">22.4 trillion digits of pi</a> %H A084145 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PiDigits.html">Pi Digits</a> %e A084145 a(4)=a(5)=a(6) = 9 because there are (exactly) six consecutive 9's occurring with starting index A049522(4)=A049522(5)=A049522(6) = 763 and there are no runs of 4, 5, 6, or more consecutive equal digits having a smaller starting index. %e A084145 The first occurrence of a run of at least seven consecutive equal digits occurs at starting index A049522(7) = 710101. The run consists of exactly seven 3's so a(7) = 3 [=A084144(7)] and also A049523(7) = 710101. %Y A084145 Cf. A049522 (starting index), A084144 (consecutively exactly n times), A049523 (starting index for A084144 runs). %K A084145 base,nonn,more %O A084145 1,1 %A A084145 _Rick L. Shepherd_, May 23 2003 %E A084145 a(10)-a(14) added by _Dmitry Petukhov_, Jan 13 2020 %E A084145 a(15)-a(17) from _Dmitry Petukhov_, Oct 30 2021