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 A019778 #20 Sep 16 2023 21:02:05
%S A019778 3,2,9,7,4,4,2,5,4,1,4,0,0,2,5,6,2,9,3,6,9,7,3,0,1,5,7,5,6,2,8,3,2,7,
%T A019778 1,4,3,3,0,7,5,5,2,2,0,1,4,2,0,2,9,6,0,2,3,1,5,0,1,5,8,6,2,3,2,8,1,3,
%U A019778 2,2,0,4,2,3,8,8,4,3,1,2,1,7,2,6,5,5,5,3,0,4,0,1,1,2,7,3,3,2,8
%N A019778 Decimal expansion of sqrt(e)/5.
%H A019778 Ivan Panchenko, <a href="/A019778/b019778.txt">Table of n, a(n) for n = 0..1000</a>
%H A019778 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>
%F A019778 Equals 0.1 * 2*sqrt(e) = 0.1 * Sum_{k>=0} (2*k+1)/(2^k * k!). - _Amiram Eldar_, Aug 07 2020
%e A019778 0.32974425414002562936973015756283271433075522014202...
%t A019778 RealDigits[Sqrt[E]/5,10,120][[1]] (* _Harvey P. Dale_, Aug 25 2019 *)
%Y A019778 Cf. A019774.
%K A019778 nonn,cons
%O A019778 0,1
%A A019778 _N. J. A. Sloane_