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 A346451 #24 Aug 05 2024 13:49:53
%S A346451 9,9,8,0,7,1,5,9,9,8,3,7,9,2,8,6,8,7,3,2,9,7,0,9,6,9,8,1,2,0,2,3,4,9,
%T A346451 5,5,7,2,5,7,8,6,6,7,7,4,4,2,0,9,0,5,1,3,1,8,0,1,1,3,7,7,6,8,6,4,0,5,
%U A346451 6,9,7,1,9,0,0,3,2,5,3,7,1,4,5,8,2,3,6
%N A346451 Decimal expansion of 23 * Pi^4 / (1296 * sqrt(3)).
%D A346451 L. B. W. Jolley, Summation of Series, Dover, 1961, Eq. (329).
%H A346451 Michael I. Shamos, <a href="https://citeseerx.ist.psu.edu/pdf/ae33a269baba5e8b1038e719fb3209e8a00abec5">Shamos's catalog of the real numbers</a> (2011).
%H A346451 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>
%F A346451 Equals 23 * Pi^4 / (2^4 * 3^4 * sqrt(3)).
%F A346451 Equals 1 + Sum_{k>=1} ( (-1)^k/(6*k-1)^4 + (-1)^k/(6*k+1)^4 ).
%e A346451 0.99807159983792868732970969812...
%t A346451 First[RealDigits[N[23*Pi^4/(2^4*3^4*Sqrt[3]),100]]] (* _Stefano Spezia_, Jul 19 2021 *)
%t A346451 RealDigits[(23 Pi^4)/(1296 Sqrt[3]),10,120][[1]] (* _Harvey P. Dale_, Jun 20 2023 *)
%Y A346451 Cf. A258414, A346450, A346449.
%K A346451 nonn,cons,easy
%O A346451 0,1
%A A346451 _Sean A. Irvine_, Jul 18 2021