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 A346404 #8 Jul 16 2021 05:23:41
%S A346404 4,1,9,5,9,5,3,5,5,6,0,6,6,5,1,9,6,4,2,0,1,3,7,5,3,5,4,0,1,7,5,5,8,5,
%T A346404 2,2,7,7,3,0,3,9,7,0,1,4,1,4,9,4,8,3,9,6,3,3,2,7,3,8,8,1,4,6,4,5,2,0,
%U A346404 9,9,8,0,6,8,4,6,0,4,2,1,3,0,0,6,1,8,3,4,5,5,9,5,5,1,8,1,6,5,3,7
%N A346404 Decimal expansion of Sum_{k>=1} A003418(k)/k!.
%C A346404 The constant is irrational (Sándor, 2002).
%H A346404 Felice Russo, <a href="http://doi.org/10.5281/zenodo.9655">On three problems concerning the Smarandache LCM sequence</a>, Smarandache Notions Journal, Vol. 12, No. 1-3 (2001), pp. 153-156.
%H A346404 József Sándor, <a href="http://fs.unm.edu/JozsefSandor2.pdf">Geometric theorems, diophantine equations and arithmetic functions</a>, American Research Press, Rehoboth, NM, USA, 2002. See p. 255.
%e A346404 4.19595355606651964201375354017558522773039701414948...
%t A346404 RealDigits[Sum[LCM @@ Range[k]/k!, {k, 1, 100}], 10, 100][[1]]
%Y A346404 Cf. A003418, A064859.
%K A346404 nonn,cons
%O A346404 1,1
%A A346404 _Amiram Eldar_, Jul 15 2021