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 A231096 #20 Apr 24 2016 12:45:42 %S A231096 7,1,0,4,3,9,2,8,7,1,5,6,5,0,3,1,8,8,6,6,9,3,4,5,8,9,3,0,6,0,7,2,1,1, %T A231096 3,2,4,8,2,8,4,5,8,4,3,9,4,3,4,4,6,0,9,6,9,0,0,8,9,5,1,4,2,9,9,1,6,0, %U A231096 1,5,9,7,2,6,0,9,6,7,2,7,3,3,9,9,0,5,9,4,6,5,3,5,7,2,9,5,5,6,1,3,9,2,5,3,2 %N A231096 Decimal expansion of the power tower of the inverse of golden ratio. %C A231096 Also the only solution of x*phi^x = 1. %H A231096 Stanislav Sykora, <a href="/A231096/b231096.txt">Table of n, a(n) for n = 0..1999</a> %H A231096 Wikipedia, <a href="http://en.wikipedia.org/wiki/Lambert_W_function">Lambert W function</a> %H A231096 Wikipedia, <a href="http://en.wikipedia.org/wiki/Tetration">Tetration</a> %F A231096 When 1/E^E <= c < 1, then c^c^c^... = LambertW(log(1/c))/log(1/c). %e A231096 0.710439287156503188669345... %t A231096 RealDigits[ LambertW[ Log[ GoldenRatio]]/Log[ GoldenRatio], 10, 111][[1]] (* _Robert G. Wilson v_, Feb 11 2015 *) %o A231096 (PARI) lambertw(log(phi))/log(phi) %Y A231096 Cf. A094214 (1/phi), A001622 (phi), A231095 (power tower of Gamma). %K A231096 nonn,cons %O A231096 0,1 %A A231096 _Stanislav Sykora_, Nov 04 2013