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 A346849 #15 Aug 06 2024 05:53:19
%S A346849 9,9,9,5,5,6,5,2,5,3,9,4,3,4,4,9,9,6,4,2,6,9,7,2,4,9,4,6,3,5,5,1,7,7,
%T A346849 0,1,4,8,2,5,0,1,7,1,1,1,9,9,8,9,1,9,7,1,3,6,7,1,4,0,0,7,1,6,5,6,9,3,
%U A346849 7,9,7,9,2,4,1,8,5,1,9,0,6,7,7,1,7,0,7
%N A346849 Decimal expansion of 2 - 307 * Pi^7 / (655360 * sqrt(2)).
%D A346849 L. B. W. Jolley, Summation of Series, Dover, 1961, Eq. (326).
%H A346849 Michael I. Shamos, <a href="https://citeseerx.ist.psu.edu/pdf/ae33a269baba5e8b1038e719fb3209e8a00abec5">Shamos's catalog of the real numbers</a> (2011).
%H A346849 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%F A346849 Equals 2 - 307 * Pi^7 / (5 * 2^17 * sqrt(2)).
%F A346849 Equals 1 + Sum_{k>=1} ( (-1)^k/(4*k-1)^7 - (-1)^k/(4*k+1)^7 ).
%e A346849 0.99955652539434499642697249463551770148250...
%t A346849 RealDigits[2 - 307*Pi^7/(655360*Sqrt[2]), 10, 120][[1]] (* _Amiram Eldar_, Jun 13 2023 *)
%Y A346849 Cf. A346570, A346908, A346907, A346850.
%K A346849 nonn,cons
%O A346849 0,1
%A A346849 _Sean A. Irvine_, Aug 06 2021