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 A063504 #17 Aug 27 2015 05:02:27
%S A063504 6,8,1,5,3,4,9,1,4,4,1,8,2,2,3,5,3,2,3,0,1,9,3,4,1,6,3,4,0,4,8,1,2,3,
%T A063504 5,2,6,7,6,7,9,1,1,0,8,6,0,3,5,1,9,7,4,4,2,4,2,0,4,3,8,5,5,4,5,7,4,1,
%U A063504 6,3,1,0,2,9,1,3,3,4,8,7,1,1,9,8,4,5,2,2,4,4,3,4,0,4,0,6,1,8,8,1,4,4,5,0,2
%N A063504 Decimal expansion of e^Pi - Pi^e.
%C A063504 A classic calculus analysis problem is to discover whether e^Pi or Pi^e is the greater without the use of a calculator.
%D A063504 Paul J. Nahin, When Least Is Best, How Mathematicians Discovered Many Clever Ways to Make Things as Small (or as Large) as Possible, Princeton University Press, Princeton NJ, 2004, Page 144.
%D A063504 Alfred S. Posamentier & Ingmar Hehmann, Pi: A Biography of the World's Most Mysterious Number, Prometheus Books, NY 2002, pages 146, 301-304.
%H A063504 Harry J. Smith, <a href="/A063504/b063504.txt">Table of n, a(n) for n = 0..20000</a>
%e A063504 0.681534914418223532301934163404812352676791108603519744242043855457416... - _Harry J. Smith_, Aug 24 2009
%t A063504 RealDigits[N[E^Pi - Pi^E, 100]][[1]]
%o A063504 (PARI) { default(realprecision, 20080); e=exp(1); x=10*(e^Pi - Pi^e); for (n=0, 20000, d=floor(x); x=(x-d)*10; write("b063504.txt", n, " ", d)) } \\ _Harry J. Smith_, Aug 24 2009
%Y A063504 Equals A039661 - A059850.
%Y A063504 Cf. A063503.
%K A063504 easy,nonn,cons
%O A063504 0,1
%A A063504 _Robert G. Wilson v_, Jul 30 2001
%E A063504 Offset corrected by _R. J. Mathar_, Feb 05 2009