This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A195606 #12 Sep 08 2022 08:45:59
%S A195606 0,1,57,577,1443,57721,115443,1443039,28860783,36075979,5772156649,
%T A195606 5772156649,577215664901,1154431329803,57721566490153,144303916225383,
%U A195606 180379895281729,28860783245076643,28860783245076643,2886078324507664303
%N A195606 Numerator of floor(gamma*10^n)/10^n, where gamma=A001620 is the Euler-Mascheroni constant.
%C A195606 Numerator of the decimal fraction of gamma=0.5772... truncated to a given number of decimal places.
%H A195606 G. C. Greubel, <a href="/A195606/b195606.txt">Table of n, a(n) for n = 0..995</a>
%e A195606 a(3) = 577 is the numerator of 0.577 = 577/1000.
%e A195606 a(4) = 1443 is the numerator of 0.5772 = 5772/10000 = 1443/2500.
%t A195606 Numerator[Table[Floor[EulerGamma*10^n]/10^n, {n, 0, 50}]] (* _G. C. Greubel_, Aug 27 2018 *)
%o A195606 (PARI) a(n,c=Euler)=numerator(c\.1^n/10^n) \\ _M. F. Hasler_, Sep 21 2011
%o A195606 (Magma) R:=RealField(100); [Numerator(Floor(EulerGamma(R)*10^n)/10^n): n in [0..50]]; // _G. C. Greubel_, Aug 27 2018
%K A195606 nonn
%O A195606 0,3
%A A195606 _M. F. Hasler_, following a suggestion by _Eric Angelini_, Sep 21 2011