%I #10 Jul 24 2019 02:02:27
%S 9,31,34,38,63,66,78,86,95,98,102,106,107,110,118,126,129,130,134,141,
%T 149,150,167,182,194,198,212,252,257,266,276,281,285,291,295,321,328,
%U 336,341,357,360,373,409,438,445
%N Positions of 4's in the decimal expansion of Euler's constant.
%H G. C. Greubel, <a href="/A054310/b054310.txt">Table of n, a(n) for n = 1..10000</a>
%t Flatten[Position[RealDigits[EulerGamma, 10, 500][[1]], 4]] (* _G. C. Greubel_, Jul 23 2019 *)
%K nonn,base
%O 1,1
%A _Simon Plouffe_, Feb 20 2000