Search: id:A068985
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%I A068985
%S A068985 3,6,7,8,7,9,4,4,1,1,7,1,4,4,2,3,2,1,5,9,5,5,2,3,7,7,0,1,6,1,4,6,0,
%T A068985 8,6,7,4,4,5,8,1,1,1,3,1,0,3,1,7,6,7,8,3,4,5,0,7,8,3,6,8,0,1,6,9,7,
%U A068985 4,6,1,4,9,5,7,4,4,8,9,9,8,0,3,3,5,7,1,4,7,2,7,4,3,4,5,9,1,9,6,4,3
%N A068985 Decimal expansion of 1/e.
%C A068985 From the "derangements" problem: this is the probability that if a large 
               number of people are given their hats at random, nobody gets their 
               own hat.
%C A068985 Also, decimal expansion of cosh(1)-sinh(1). - Mohammad K. Azarian (azarian(AT)evansville.edu), 
               Aug 15 2006
%D A068985 A. Hald, A History of Probability and Statistics and Their Applications 
               Before 1750, Wiley, NY, 1990 (Chapter 19).
%D A068985 J. Riordan, An Introduction to Combinatorial Analysis, Wiley, 1958, p. 
               65.
%D A068985 Mohammad K. Azarian, An Expansion of e, Problem # B-765, Fibonacci Quarterly, 
               Vol. 32, No. 2, May 1994, p. 181. Solution appeared in Vol. 33, No. 
               4, Aug.1995, p. 377. [From Mohammad K. Azarian (azarian(AT)evansville.edu), 
               Feb 08 2009]
%H A068985 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               FactorialSums.html">Factorial Sums</a>
%H A068985 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               SultansDowryProblem.html">Sultan's Dowry Problem</a>
%H A068985 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               e.html">e</a>
%e A068985 1/e=0.3678794411714423215955237701614608674458111310317678...
%t A068985 RealDigits[N[1/E,6! ]][[1]] [From Vladimir Orlovsky (4vladimir(AT)gmail.com), 
               Jun 18 2009]
%Y A068985 Cf. A000166, A001113, A068996, A092553.
%Y A068985 Sequence in context: A003458 A133339 A112267 this_sequence A081391 A073850 
               A048748
%Y A068985 Adjacent sequences: A068982 A068983 A068984 this_sequence A068986 A068987 
               A068988
%K A068985 nonn,cons
%O A068985 0,1
%A A068985 N. J. A. Sloane (njas(AT)research.att.com), Apr 08 2002

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