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 A346713 #24 Sep 01 2021 12:26:36
%S A346713 8,3,2,5,5,4,6,1,1,1,5,7,6,9,7,7,5,6,3,5,3,1,6,4,6,4,4,8,9,5,2,0,1,0,
%T A346713 4,7,6,3,0,5,8,8,8,5,2,2,6,4,4,4,0,7,2,9,1,6,6,8,2,9,1,1,7,2,3,4,0,7,
%U A346713 9,4,3,5,1,9,7,3,0,4,6,3,7,1,4,8,9,9,8,0
%N A346713 Decimal expansion of sqrt(log 2).
%C A346713 Represents a transcendental number.
%D A346713 Ludwig Seidel, Ueber eine Darstellung des Kreisbogens, des Logarithmus und des elliptischen Integrales erster Art durch unendliche Producte, Borchardt J., (1871), vol. 73, pp. 273-291.
%H A346713 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>
%F A346713 Equals Product_{k>=1} (2/(2^(1/2^k) + 1))^(1/2).
%F A346713 Equals sqrt(2*arccoth(3)) = sqrt(A002162).
%e A346713 0.8325546111576977563531646448952010476305888522644407291668291172340794351973...
%p A346713 Digits := 120; sqrt(log(2)): evalf(%)*10^91:
%p A346713 ListTools:-Reverse(convert(floor(%), base, 10));
%t A346713 RealDigits[Sqrt[Log[2]], 10, 100][[1]] (* _Amiram Eldar_, Sep 01 2021 *)
%o A346713 (Julia)
%o A346713 using Nemo
%o A346713 R = RealField(305); _1 = R(1); _2 = R(2); H = R(1/2)
%o A346713 p = prod((_2/(_2^(_1/_2^k) + 1))^H for k in 1:300)
%o A346713 println(p)
%Y A346713 Cf. A002162.
%K A346713 nonn,cons
%O A346713 0,1
%A A346713 _Peter Luschny_, Sep 01 2021