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 A276635 #9 Feb 16 2025 08:33:36 %S A276635 4,4,3,0,0,1,4,5,7,4,3,8,8,3,8,0,5,6,6,7,4,4,1,9,2,6,9,9,9,2,7,1,9,0, %T A276635 4,6,6,9,7,5,0,2,2,6,0,5,5,5,1,9,6,4,6,2,7,9,2,0,1,2,0,9,6,6,8,6,0,6, %U A276635 0,3,1,3,1,0,6,4,0,4,9,1,9,9,9,9,0,0,0,4,8,4,1,0,0,6,6,8,9,8,6,8,8,2,0,7,9,5,9,0,8,1,3,6,1,6,9,4,1,7,0,7 %N A276635 Decimal expansion of the power tower of 1/(2*Pi): the real solution to (2*Pi)^x*x = 1. %H A276635 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PlouffesConstants.html">Plouffe's Constants</a> %H A276635 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PowerTower.html">Power Tower</a> %H A276635 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/LambertW-Function.html">Lambert W-Function</a> %F A276635 Equals LambertW(log(2*Pi))/log(2*Pi). %F A276635 Equals exp(-LambertW(A061444)). %e A276635 (1/(2*Pi))^(1/(2*Pi))^(1/(2*Pi))^... = 0.443001457438838056674419269992719... %t A276635 RealDigits[ProductLog[Log[2 Pi]]/Log[2 Pi], 10, 120][[1]] %Y A276635 Cf. A019692, A073243, A061444, A086201. %K A276635 nonn,cons %O A276635 0,1 %A A276635 _Ilya Gutkovskiy_, Sep 08 2016