%I #14 Feb 07 2015 02:28:15

%S 13,36,45,48,49,50,52,56,59,81,108,110,118,119,129,133,140,147,153,

%T 170,174,184,192,199,212,223,226,227,238,289,296,297,301,338,348,364,

%U 370,387,389,394,402,409,436,446,450

%N Positions of 9's in the decimal expansion of exp(1).

%H Vincenzo Librandi, <a href="/A054285/b054285.txt">Table of n, a(n) for n = 1..1000</a>

%t Flatten[Position[RealDigits[E,10, 1000][[1]], 9]] (* _Vincenzo Librandi_, Oct 07 2013 *)

%K nonn,base

%O 1,1

%A _Simon Plouffe_, Feb 20 2000