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 A330119 #7 Dec 02 2019 02:04:51 %S A330119 9,9,9,8,4,7,7,4,1,5,3,1,0,8,8,1,1,2,9,5,9,8,1,0,7,6,8,6,7,9,7,9,9,7, %T A330119 9,9,1,8,1,8,7,2,5,8,6,1,5,2,7,7,5,8,8,3,7,5,4,6,6,9,8,6,1,1,4,2,9,5, %U A330119 3,8,5,3,3,1,2,1,6,3,6,3,5,5,7,8,9,5,8 %N A330119 Degrees-based analog to the Dottie number (A003957). %C A330119 Using a calculator that has a cosine button and is set to calculate the values of trigonometric functions with the angles measured in degrees, start with any number and repeatedly hit the cosine button; the result will always converge to this value. %C A330119 (If the calculator is set to calculate the values of trigonometric functions with the angles measured in radians rather than degrees, repeatedly hitting the cosine button will result in the value given at A003957.) %e A330119 0.9998477415310881129... %o A330119 (PARI) solve(x=0, 1, cos(Pi*x/180)-x) \\ _Michel Marcus_, Dec 02 2019 %Y A330119 Cf. A003957. %K A330119 nonn,cons %O A330119 0,1 %A A330119 _Jon E. Schoenfield_, Dec 01 2019