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 A347081 #35 Aug 03 2024 12:41:00
%S A347081 9,9,5,5,1,0,8,2,6,5,1,3,4,1,2,5,0,9,4,4,5,5,5,2,6,0,0,9,9,8,6,0,8,6,
%T A347081 5,0,8,4,1,7,1,5,9,2,4,2,5,3,6,5,4,3,1,5,7,6,8,5,6,3,0,4,0,8,4,1,4,5,
%U A347081 0,1,8,0,7,2,6,6,0,9,4,3,5,1,4,1,9,1,2
%N A347081 Decimal expansion of (91 + 45*sqrt(5)) * Pi^4 / 18750.
%H A347081 Michael I. Shamos, <a href="https://citeseerx.ist.psu.edu/pdf/ae33a269baba5e8b1038e719fb3209e8a00abec5">Shamos's catalog of the real numbers</a> (2011).
%H A347081 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%F A347081 Equals 1 + Sum_{k>=1} ( (-1)^k/(5*k-1)^4 + (-1)^k/(5*k+1)^4 ).
%e A347081 0.99551082651341250944555260099860...
%t A347081 RealDigits[(91 + 45*Sqrt[5]) * Pi^4 / 18750, 10, 120][[1]] (* _Amiram Eldar_, Jun 20 2023 *)
%Y A347081 Cf. A346451, A346571.
%K A347081 nonn,cons
%O A347081 0,1
%A A347081 _Sean A. Irvine_, Aug 20 2021