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 A347407 #20 Aug 31 2021 08:29:25
%S A347407 6,8,4,9,7,7,2,3,1,5,3,1,5,5,8,1,7,2,7,1,3,4,4,6,0,9,6,9,3,0,7,6,5,6,
%T A347407 1,8,1,0,0,0,6,3,8,2,3,6,4,0,1,3,4,8,8,3,9,8,1,2,2,8,6,6,7,8,9,1,5,2,
%U A347407 8,0,2,0,4,0,1,4,8,3,1,0,7,4,5,9,4,8
%N A347407 Decimal expansion of Sum_{i>=1} of i/Pi^i.
%F A347407 Equals Pi/(Pi-1)^2. - _Vaclav Kotesovec_, Aug 30 2021
%F A347407 Equals 1/(A098801 - 2). - _Amiram Eldar_, Aug 30 2021
%e A347407 0.684977231531558172713446096930765618100063823640134883981...
%t A347407 RealDigits[Pi/(Pi - 1)^2, 10, 100][[1]] (* _Amiram Eldar_, Aug 30 2021 *)
%o A347407 (PARI) suminf(i=1, i/Pi^i) \\ _Michel Marcus_, Aug 30 2021
%Y A347407 Cf. A000796, A098801.
%K A347407 nonn,cons
%O A347407 0,1
%A A347407 _Christoph B. Kassir_, Aug 30 2021