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A091132 Decimal expansion of e^2 - 2e. 0

%I

%S 1,9,5,2,4,9,2,4,4,2,0,1,2,5,5,9,7,5,6,5,0,9,8,5,2,5,1,7,8,6,9,6,8,2,

%T 8,1,7,6,6,5,8,2,1,3,8,3,1,5,1,9,2,8,1,7,4,1,5,3,1,9,2,5,6,7,0,7,4,4,

%U 2,0,5,3,5,3,7,1,9,6,2,5,7,4,2,4,1,5,4,8,1,2,8,0,2,8,7,8,8,9,3,9,9,1

%N Decimal expansion of e^2 - 2e.

%C Average length of the 2nd increasing run in a random permutation of n integers as n->Infinity.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Permutation.html">Permutation</a>

%F Equals (Sum_{n>0}(Sum_{k>0} 1/(n!*k!)))-1. - _Fredrik Johansson_, Apr 21 2006

%e -2*e + e^2 = 1.95249244...

%t RealDigits[E^2-2*E,10,120][[1]] (* _Harvey P. Dale_, Nov 04 2019 *)

%K nonn,cons,easy

%O 1,2

%A _Eric W. Weisstein_, Dec 19 2003

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Last modified June 4 01:54 EDT 2020. Contains 334812 sequences. (Running on oeis4.)