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 A349804 #32 Aug 06 2024 05:56:06
%S A349804 1,0,0,2,7,7,8,3,2,8,9,4,7,1,0,4,0,6,1,0,7,6,9,6,9,0,1,3,3,1,4,0,8,5,
%T A349804 0,7,8,8,6,9,2,1,8,6,9,1,7,4,7,9,4,1,4,7,7,0,6,7,3,0,4,9,5,9,3,2,9,6,
%U A349804 6,8,6,6,8,2,7,4,7,5,1,9,3,4
%N A349804 Decimal expansion of cosh(1) - cos(1).
%H A349804 Michael Ian Shamos, <a href="https://citeseerx.ist.psu.edu/pdf/ae33a269baba5e8b1038e719fb3209e8a00abec5">Shamos's catalog of the real numbers</a>, (2011).
%F A349804 Equals 2 * Sum_{k>=0} 1/(4*k+2)! = 2 * A334364. - _Amiram Eldar_, Dec 11 2021
%e A349804 1.00277832894710406107696901331408507...
%t A349804 RealDigits[Cosh[1] - Cos[1], 10, 100][[1]] (* _Amiram Eldar_, Dec 11 2021 *)
%o A349804 (PARI) cosh(1) - cos(1)
%Y A349804 Cf. A073743, A049470, A334364, A334365.
%K A349804 nonn,cons
%O A349804 1,4
%A A349804 _Christoph B. Kassir_, Dec 11 2021