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 A073447 #29 May 29 2023 01:48:20
%S A073447 1,1,8,8,3,9,5,1,0,5,7,7,8,1,2,1,2,1,6,2,6,1,5,9,9,4,5,2,3,7,4,5,5,1,
%T A073447 0,0,3,5,2,7,8,2,9,8,3,4,0,9,7,9,6,2,6,2,5,2,6,5,2,5,3,6,6,6,3,5,9,1,
%U A073447 8,4,3,6,7,3,5,7,1,9,0,4,8,7,9,1,3,6,6,3,5,6,8,0,3,0,8,5,3,0,2,3,2,4,7,2,4
%N A073447 Decimal expansion of csc(1).
%C A073447 By the Lindemann-Weierstrass theorem, this constant is transcendental. - _Charles R Greathouse IV_, May 13 2019
%H A073447 Mohammad K. Azarian, <a href="http://www.jstor.org/stable/27646393">Solution of Forty-Five Nested Equilateral Triangles and cosecant of 1 degree, Problem 813</a>, College Mathematics Journal, Vol. 37, No. 5, November 2006, pp. 394-395. <a href="http://www.jstor.org/stable/27646393">Solution</a> published in Vol. 37 , No. 5, November 2006, pp. 394-395.
%H A073447 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%F A073447 Equals Sum_{n=-oo..oo} ((-1)^n/(1 + n*Pi)). - _Jean-François Alcover_, Mar 21 2013.
%F A073447 Equals Sum_{k>=0} (-1)^k * (2 - 4^k) * bernoulli(2*k)/(2*k)! = Sum_{k>=0} (-1)^k * (2 - 4^k) * A027641(2*k)/(A027642(2*k)*(2*k)!). - _Amiram Eldar_, Aug 03 2020
%e A073447 1.18839510577812121626159945237...
%t A073447 RealDigits[Csc[1], 10, 120][[1]] (* _Amiram Eldar_, May 29 2023 *)
%o A073447 (PARI) 1/sin(1)
%Y A073447 Cf. A049469 (sin(1)=1/A073447), A049470 (cos(1)), A049471 (tan(1)), A073448 (sec(1)), A073449 (cot(1)).
%Y A073447 Cf. A027641, A027642.
%K A073447 cons,nonn
%O A073447 1,3
%A A073447 _Rick L. Shepherd_, Aug 01 2002