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 A306811 #36 Jun 20 2023 10:08:19
%S A306811 1,4,6,6,9,4,2,2,0,6,9,2,4,2,5,9,8,5,9,9,8,3,3,9,4,8,1,3,2,3,3,6,6,7,
%T A306811 5,7,3,1,4,3,2,6,8,4,0,6,7,4,3,1,8,2,3,6,7,2,5,3,4,1,3,1,0,1,6,6,1,0,
%U A306811 9,9,7,8,5,6,4,6,4,5,8,9,1,8,8,7,5,2,2,2,3,6,9,5,5,6,8,5,4,1,3,9,6,8,0,8,1
%N A306811 Decimal expansion of Pi/(Pi - 1) = 1 + 1/Pi + 1/Pi^2 + ... .
%C A306811 Apart from the first digit the same as A201775. - _R. J. Mathar_, Apr 09 2019
%H A306811 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%F A306811 Equals Sum_{j>=0} 1/(Pi^j).
%e A306811 1.4669422069242598599833948...
%t A306811 RealDigits[Pi/(Pi - 1), 10, 120][[1]] (* _Amiram Eldar_, Jun 20 2023 *)
%o A306811 (PARI) Pi/(Pi-1) \\ _Michel Marcus_, Mar 12 2019
%Y A306811 Cf. A000796 (Pi), A185393 (e/(e-1)), A201775.
%K A306811 nonn,cons
%O A306811 1,2
%A A306811 _Giovanni Zedda_, Mar 11 2019