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 A333761 #15 Feb 16 2025 08:33:59
%S A333761 5,9,8,9,4,1,8,6,2,4,5,8,4,5,2,9,6,4,3,4,9,3,7,4,6,2,4,9,9,3,5,4,3,3,
%T A333761 7,0,9,0,4,3,9,3,0,1,3,4,9,5,4,0,2,2,2,3,6,3,0,4,0,3,5,0,7,9,2,2,1,3,
%U A333761 0,3,6,0,0,4,5,4,2,0,3,0,0,0,4,6,6,7,4,1,8,2,8,7,0,9,1,3,7,2,3,2,5,5,5,6,9,0
%N A333761 Decimal expansion of root of the equation LambertW(r) = 1 - r.
%H A333761 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/LambertW-Function.html">Lambert W-Function</a>.
%H A333761 Wikipedia, <a href="https://en.wikipedia.org/wiki/Lambert_W_function">Lambert W function</a>.
%e A333761 0.59894186245845296434937462499354337090439301349540222363040350792213...
%t A333761 RealDigits[r/.FindRoot[LambertW[r] == 1 - r, {r, 1/2}, WorkingPrecision->150], 10, 120][[1]]
%o A333761 (PARI) solve(x=0, 1, 1-x-lambertw(x)) \\ _Michel Marcus_, Jun 09 2020
%Y A333761 Cf. A030178, A334242.
%K A333761 nonn,cons
%O A333761 0,1
%A A333761 _Vaclav Kotesovec_, Jun 09 2020