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 A330479 #14 Jan 14 2023 13:36:04 %S A330479 1,2,7,7,8,1,1,2,1,9,7,8,6,1,3,0,0,4,5,4,4,6,0,8,5,4,9,2,1,1,5,0,0,1, %T A330479 5,6,2,6,3,6,0,6,3,1,1,4,1,1,0,3,6,9,4,6,4,8,1,7,4,2,5,5,6,4,5,0,4,5, %U A330479 1,4,7,5,9,2,1,5,8,1,1,5,5,2,6,7,6,8,6,2,4,9,7,0,1,5,8,2,4,3,5,8,9,5,4,7,5 %N A330479 Decimal expansion of 2*e^2-2 (or 2*(e^2-1)). %C A330479 Solution of the equation W(x+W(x+W(...))) = 2, where W(x) is the Lambert W function. %C A330479 2*e^2-2 is a transcendental number. %H A330479 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %F A330479 Equals 2*(A072334 - 1). %e A330479 12.7781121978613004544608549211500156263606311411036946481742556450... %t A330479 RealDigits[2*(E^2-1), 10, 105][[1]] (* _Amiram Eldar_, Dec 19 2019 *) %Y A330479 Cf. A001113, A072334. %K A330479 easy,cons,nonn %O A330479 2,2 %A A330479 _Eder Vanzei_, Dec 15 2019