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 A119279 #7 Feb 16 2025 08:33:01 %S A119279 2,6,8,3,1,5,0,9,0,0,4,7,4,0,7,1,8,0,1,4,4,9,9,3,6,7,5,8,6,4,5,1,4,8, %T A119279 2,5,1,0,3,8,6,1,0,9,2,0,5,5,4,4,3,5,4,9,3,0,9,3,6,8,0,8,6,8,4,2,3,6, %U A119279 3,0,4,4,6,1,4,2,9,0,9,7,0,2,1,7,4,6,3,6,2,9,8,3,1,5,3,8,0,0,0,0,3,5,0,3,0 %N A119279 Decimal expansion of Feigenbaum d constant. %H A119279 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/FeigenbaumConstant.html">Feigenbaum Constant</a> %e A119279 2.6831509004740718014... %Y A119279 Cf. A119277, A119278, A119279. %K A119279 nonn,cons %O A119279 1,1 %A A119279 _Eric W. Weisstein_, May 12 2006