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 A178394 #15 Mar 26 2022 10:17:02
%S A178394 4,2,6,0,8,2,0,4,7,6,3,5,7,0,0,3,3,8,1,7,0,0,1,2,1,2,2,4,6,4,5,7,0,2,
%T A178394 4,6,4,9,3,3,4,2,4,3,7,3,9,5,9,3,2,1,9,7,4,9,1,1,6,0,4,8,9,3,5,9,9,3,
%U A178394 4,4,3,4,8,7,2,7,5,0,0,0,8,5,3,4,8,8,8,7,5,3,7,0,1,5,6,9,4,7,7,2,8,9,9,0,3
%N A178394 Decimal expansion of e!.
%C A178394 Gamma(e+1).
%H A178394 Alois P. Heinz, <a href="/A178394/b178394.txt">Table of n, a(n) for n = 1..1000</a>
%H A178394 D. M. Bătinetu-Giurgiu, <a href="https://www.jstor.org/stable/10.4169/amer.math.monthly.121.10.946">Problem 11808</a>, The American Mathematical Monthly, Vol. 121, No. 10 (2014), p. 947; <a href="https://www.jstor.org/stable/10.4169/amer.math.monthly.123.9.941">A Gamma Integral Limit</a>, Solution to Problem 11808 by Roberto Tauraso, ibid., Vol. 123, No. 9 (2016), pp. 944-945.
%F A178394 Equals Integral_{x>=0} x^e/e^x dx. - _Alois P. Heinz_, Aug 27 2015
%F A178394 Equals lim_{n->oo} n^2 * Integral_{x=n!^(1/n)..(n+1)!^(1/(n+1))} Gamma(n*x) dx (Bătinetu-Giurgiu, 2014). - _Amiram Eldar_, Mar 26 2022
%e A178394 4.2608204763570033817001212246457024649334243739593219749116...
%t A178394 RealDigits[N[E!,200]]
%Y A178394 Cf. A073233, A111293, A144749.
%K A178394 nonn,cons
%O A178394 1,1
%A A178394 _Vladimir Joseph Stephan Orlovsky_, May 27 2010