%I #11 Jul 24 2019 02:04:28
%S 1,6,13,22,41,45,52,57,100,124,133,154,158,160,187,189,191,207,216,
%T 221,227,235,244,247,258,261,264,275,294,298,302,306,307,309,320,331,
%U 335,340,348,364,369,388,389,412
%N Positions of 5's in the decimal expansion of Euler's constant.
%H G. C. Greubel, <a href="/A054311/b054311.txt">Table of n, a(n) for n = 1..10000</a>
%t Flatten[Position[RealDigits[EulerGamma, 10, 500][[1]], 5]] (* _G. C. Greubel_, Jul 23 2019 *)
%K nonn,base
%O 1,2
%A _Simon Plouffe_, Feb 20 2000