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 A053750 #18 May 31 2021 10:09:24 %S A053750 8,21,23,42,70,73,76,83,99,109,118,119,128,182,185,201,212,213,220, %T A053750 227,235,240,254,258,259,264,269,277,278,287,291,310,311,313,333,348, %U A053750 351,360,378,379,388,398,411,427 %N A053750 Positions of 6's in the decimal expansion of Pi. %H A053750 Vincenzo Librandi, <a href="/A053750/b053750.txt">Table of n, a(n) for n = 1..1000</a> %H A053750 <a href="/index/Ph#Pi314">Index entries for sequences related to the number Pi</a> %F A053750 a(n) = A037005(n) + 1. - _Georg Fischer_, May 31 2021 %t A053750 Flatten[Position[RealDigits[Pi, 10, 1000][[1]], 6]] (* _Vincenzo Librandi_, Oct 07 2013 *) %Y A053750 Cf. A037005. %K A053750 nonn,base %O A053750 1,1 %A A053750 _Simon Plouffe_, Feb 20 2000