Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #25 May 20 2019 07:08:50
%S 2,25,27,37,38,40,43,54,61,64,65,69,79,84,90,100,103,124,138,158,169,
%T 176,188,204,211,215,235,242,264,265,272,283,286,291,292,293,305,308,
%U 332,349,353,355,362,368,373,377
%N Positions of 7's in the decimal expansion of exp(1).
%C A001113 is the decimal expansion of the constant e.
%H Vincenzo Librandi, <a href="/A054283/b054283.txt">Table of n, a(n) for n = 1..1000</a>
%t Flatten[Position[RealDigits[N[E,500]][[1]],7]] (* _Harvey P. Dale_, Feb 01 2011 *)
%Y Cf. A001113, A054276, A054277, A054278, A054279, A054280, A054281, A054282, A054284, A054285.
%K nonn,base
%O 1,1
%A _Simon Plouffe_, Feb 20 2000