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 A238239 #12 Jun 06 2023 04:21:11 %S A238239 7,6,3,4,5,4,1,5,2,5,4,0,2,4,4,9,4,9,8,6,9,3,6,6,0,2,6,6,5,7,0,0,4,7, %T A238239 0,2,2,8,6,6,5,3,2,9,3,8,0,3,3,8,4,2,5,5,3,9,9,4,2,7,3,3,6,1,5,0,4,0, %U A238239 0,6,1,9,2,0,7,4,1,3,1,9,4,1,2,7,5,7,1 %N A238239 Decimal expansion of the polar angle, in degrees, of a cone which makes a golden-ratio cut of the full solid angle. %C A238239 See A238238 which is the equivalent of this constant in radians. %H A238239 Stanislav Sykora, <a href="/A238239/b238239.txt">Table of n, a(n) for n = 2..2000</a> %H A238239 Wikipedia, <a href="http://en.wikipedia.org/wiki/Solid_angle">Solid angle</a>. %F A238239 Equals (180/Pi)*A238238. %e A238239 76.345415254024494986936602665700470228665329380338425539942733615... %t A238239 RealDigits[ArcCos[2/GoldenRatio-1]*180/Pi, 10, 120][[1]] (* _Amiram Eldar_, Jun 06 2023 *) %o A238239 (PARI) acos(4/(1+sqrt(5))-1)*180/Pi %Y A238239 Cf. A001622, A238238. %K A238239 nonn,cons,easy %O A238239 2,1 %A A238239 _Stanislav Sykora_, Feb 20 2014