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%I #21 Mar 25 2014 13:47:36
%S 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 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 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 Decimal expansion of e^e^e^e.
%H 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 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 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 2.331504399007195462289689911012137666332017428963... * 10^1656520
%t RealDigits[Exp[Exp[Exp[Exp[1]]]],10,120][[1]] (* _Harvey P. Dale_, Sep 06 2012 *)
%o (PARI) exp(exp(exp(exp(1)))) \\ _Charles R Greathouse IV_, Mar 25 2014
%Y Cf. A073226, A073227, A073228, A181180, A073232, A202955.
%K cons,nonn
%O 1656521,1
%A _N. J. A. Sloane_, Jul 15 2003
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