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 A095803 #9 Feb 16 2025 08:32:53 %S A095803 2,4,16,28,28,112,92,368,28,112,448,1792,7168,28672,22012,88048, %T A095803 352192,667324,1186396,1779772,1187452,4749808,18999232,28543804, %U A095803 19268956,77075824,308303296,473963068,377352028,1509408112 %N A095803 Values of r in Wolfram's iteration for sqrt(2). %H A095803 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/WolframsIteration.html">Wolfram's Iteration</a> %F A095803 Apparently a(n) = 4*A201125(n) for n >= 1. - _Hugo Pfoertner_, Dec 07 2022 %Y A095803 Cf. A095804. %K A095803 nonn %O A095803 0,1 %A A095803 _Eric W. Weisstein_, Jun 07 2004