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 A073227 #20 Sep 08 2022 08:45:06
%S A073227 3,8,1,4,2,7,9,1,0,4,7,6,0,2,2,0,5,9,2,2,0,9,2,1,9,5,9,4,0,9,8,2,0,3,
%T A073227 5,7,1,0,2,3,9,4,0,5,3,6,2,2,6,6,6,6,0,7,5,5,2,6,7,0,4,1,2,5,8,0,4,7,
%U A073227 6,8,8,9,6,7,1,2,5,9,9,6,6,1,0,0,1,0,7,8,4,9,1,0,9,2,0,6,5,7,8,9,6,0,2,1,0
%N A073227 Decimal expansion of e^e^e.
%C A073227 A weak form of Schanuel's Conjecture implies that e^e^e is transcendental--see Marques and Sondow (2012).
%H A073227 Harry J. Smith, <a href="/A073227/b073227.txt">Table of n, a(n) for n = 7..20000</a>
%H A073227 D. Marques and J. Sondow, <a href="http://arxiv.org/abs/1212.6931">The Schanuel Subset Conjecture implies Gelfond's Power Tower Conjecture</a>, arXiv:1212.6931 [math.NT], 2013.
%e A073227 3814279.10476022059220921959409...
%t A073227 RealDigits[E^E^E,10,120][[1]] (* _Harvey P. Dale_, Dec 14 2011 *)
%o A073227 (PARI) exp(exp(exp(1)))
%o A073227 (PARI) { default(realprecision, 20080); x=exp(exp(exp(1)))/1000000; for (n=7, 20000, d=floor(x); x=(x-d)*10; write("b073227.txt", n, " ", d)); } \\ _Harry J. Smith_, Apr 30 2009
%o A073227 (Magma) Exp(Exp(Exp(1))); // _G. C. Greubel_, May 29 2018
%Y A073227 Cf. A001113 (e), A073226 (e^e), A004002 (e^e^...^e, n times, rounded), A073228 ((e^e)^e), A073231 ((1/e)^(1/e)^(1/e)).
%K A073227 cons,nonn
%O A073227 7,1
%A A073227 _Rick L. Shepherd_, Jul 22 2002