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 A347199 #15 Aug 06 2024 06:00:00
%S A347199 9,8,8,8,9,7,7,0,5,7,6,2,8,6,5,0,9,6,3,8,2,1,2,9,5,4,0,8,9,2,6,8,6,1,
%T A347199 8,8,6,4,2,1,4,9,6,9,5,0,3,3,1,4,7,6,0,7,5,3,6,8,1,6,0,1,0,4,2,9,7,3,
%U A347199 5,4,4,5,7,6,9,7,2,3,0,5,0,5,9,5,1,2,1
%N A347199 Decimal expansion of sin(1) * sinh(1).
%D A347199 I. S. Gradshteyn and I. M. Ryzhik, Table of Integrals, Series and Products, Academic Press (1979), Eq. (1.413.1).
%H A347199 Michael I. Shamos, <a href="https://citeseerx.ist.psu.edu/pdf/ae33a269baba5e8b1038e719fb3209e8a00abec5">Shamos's catalog of the real numbers</a> (2011).
%F A347199 Equals Sum_{k>=0} (-1)^k * 2^(2*k+1) / (4*k+2)!.
%F A347199 Equals Product_{k>=1} (1 - 1/(Pi^4*k^4)).
%F A347199 Equals 0F3(;3/4,5/4,3/2; -1/64). - _R. J. Mathar_, Aug 03 2024
%e A347199 0.9888977057628650963821295408926861886421496950...
%t A347199 RealDigits[Sin[1] * Sinh[1], 10, 120][[1]] (* _Amiram Eldar_, Jun 15 2023 *)
%o A347199 (PARI) sin(1) * sinh(1) \\ _Amiram Eldar_, Jun 15 2023
%Y A347199 Cf. A049469, A073742.
%K A347199 nonn,cons
%O A347199 0,1
%A A347199 _Sean A. Irvine_, Aug 22 2021