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 A094078 #11 Feb 16 2025 08:32:53 %S A094078 4,6,6,9,2,0,1,9,3,1,8,5,9,9,0,7,7,3,1,5,5,8,8,5,2,6,2,6,0,8,2,3,9,7, %T A094078 8,7,4,5,5,7,3,1,5,7,1,2,5,4,9,3,2,2,9,8,0,1,2,6,8,7,1,9,7,4,3,6,0,8, %U A094078 5,1,7,6,6,1,2,1,9,2,2,6,2,5,4,2,5,9,0,4,6,9,9,2,7,3,1,4,8,8,0,9,1,0,3,8,3 %N A094078 Decimal expansion of Pi + arctan(e^Pi). %C A094078 This is an approximation to the Feigenbaum constant. %H A094078 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/FeigenbaumConstant.html">Feigenbaum constant</a>. %e A094078 4.669201931859907731558852626... %t A094078 RealDigits[Pi + ArcTan[E^Pi], 10, 120][[1]] (* _Robert G. Wilson v_, May 04 2004 *) %Y A094078 Cf. A006890, A039661. %K A094078 nonn,cons %O A094078 1,1 %A A094078 Jun Mizuki (suzuki32(AT)sanken.osaka-u.ac.jp), Apr 30 2004 %E A094078 More terms from _Klaus Brockhaus_ and _Robert G. Wilson v_, May 03 2004