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Positions of 5's in the decimal expansion of Euler's constant.
1

%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