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 A361519 #13 Apr 04 2023 01:25:08
%S A361519 3,1,3,1,6,5,8,8,0,4,5,0,8,6,8,3,7,5,8,7,1,8,6,9,3,0,8,2,6,5,7,0,5,9,
%T A361519 3,1,5,2,5,1,4,2,0,4,5,5,2,0,2,1,0,1,0,5,6,4,1,5,1,0,7,0,6,4,7,2,5,8,
%U A361519 1,9,7,3,7,6,3,4,8,0,7,5,2,2,8,5,6,2,5,3,8,0,9,8,6,0,6,7,8,0,5,0,1,8,6,6,0
%N A361519 Decimal expansion of arccsch(Pi).
%H A361519 Michael I. Shamos, <a href="http://euro.ecom.cmu.edu/people/faculty/mshamos/cat.pdf">A catalog of the real numbers</a> (2011).
%F A361519 Equals arcsinh(1/Pi).
%F A361519 Equals log(sqrt(1/Pi^2 + 1) + 1/Pi).
%F A361519 Equals Integral_{x=Pi..oo} 1/(x*sqrt(1 + x^2)) dx.
%e A361519 0.313165880450868375871869308265705931525142045520210105641510706472...
%t A361519 RealDigits[ArcCsch[Pi], 10, 105][[1]]
%o A361519 (PARI) asinh(1/Pi) \\ _Michel Marcus_, Mar 15 2023
%Y A361519 Cf. A359540, A360938, A361518.
%K A361519 cons,nonn
%O A361519 0,1
%A A361519 _Wolfe Padawer_, Mar 14 2023