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 A085667 #21 Mar 25 2014 13:47:36 %S A085667 2,3,3,1,5,0,4,3,9,9,0,0,7,1,9,5,4,6,2,2,8,9,6,8,9,9,1,1,0,1,2,1,3,7, %T A085667 6,6,6,3,3,2,0,1,7,4,2,8,9,6,3,5,1,6,8,2,3,2,8,0,0,5,4,5,4,6,8,1,8,0, %U A085667 7,9,4,3,6,6,4,2,4,9,7,3,1,4,8,5,7,3,0,6,6,6,1,3,2,1,4,0,7,6,7 %N A085667 Decimal expansion of e^e^e^e. %H A085667 J. Blanck, <a href="http://cs-svr1.swan.ac.uk/~csjens/pdf/20640389.pdf">Exact real arithmetic systems: results of competition</a>, pp. 389-393 of J. Blanck et al., eds., Computability and Complexity in Analysis (CCA 2000), Lect. Notes Computer Science, Springer-Verlag, 2001. %H A085667 Hans Havermann, <a href="http://chesswanks.com/num/e%5ee%5ee%5ee/ip.txt">integer part of e^e^e^e (in blocks of 100 digits)</a> = the first 1656521 terms %H A085667 Hans Havermann, <a href="http://chesswanks.com/num/e%5ee%5ee%5ee/fp.txt">fractional part of e^e^e^e (in blocks of 100 digits)</a> = an additional 1656521 terms %e A085667 2.331504399007195462289689911012137666332017428963... * 10^1656520 %t A085667 RealDigits[Exp[Exp[Exp[Exp[1]]]],10,120][[1]] (* _Harvey P. Dale_, Sep 06 2012 *) %o A085667 (PARI) exp(exp(exp(exp(1)))) \\ _Charles R Greathouse IV_, Mar 25 2014 %Y A085667 Cf. A073226, A073227, A073228, A181180, A073232, A202955. %K A085667 cons,nonn %O A085667 1656521,1 %A A085667 _N. J. A. Sloane_, Jul 15 2003