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 A019474 #17 Jul 08 2025 07:31:27 %S A019474 0,1,1,3,4,2,10,4,1,1,1,1,2,7,306,1,5,1,2,1,5,1,1,1,1,7,1,4,2,15,1,2, %T A019474 1,1,4,1,3,3,5,4,1,1,1,4,3,1,38,1,2,4,1,5,2,1,6,2,1,1,1,1,1,1,1,1,3,4, %U A019474 5,3,2,11,1,1,1,49,4,1,1,1 %N A019474 Continued fraction expansion of W(1), where W(x) is the Lambert W function (the root of w*exp(w) = x). %H A019474 G. C. Greubel, <a href="/A019474/b019474.txt">Table of n, a(n) for n = 0..10000</a> %H A019474 <a href="/index/Con#confC">Index entries for continued fractions for constants</a> %e A019474 0.5671432904097838... %p A019474 Digite := 80: evalf(LambertW(1)); convert(%,confrac); %t A019474 ContinuedFraction[ ProductLog[1], 78] (* _Jean-François Alcover_, Jun 24 2013 *) %o A019474 (PARI) contfrac(lambertw(1)) \\ _G. C. Greubel_, Mar 03 2018 %Y A019474 Cf. A030178. %K A019474 nonn,cofr %O A019474 0,4 %A A019474 Robert Corless (rmc(AT)pineapple.apmaths.uwo.ca), _N. J. A. Sloane_