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 A380795 #7 Feb 05 2025 09:23:19 %S A380795 9,7,1,9,8,5,0,2,2,4,1,6,7,0,6,7,2,4,6,9,0,6,5,7,4,7,6,7,1,8,6,9,9,4, %T A380795 4,9,1,8,7,6,3,7,9,0,4,1,7,5,2,7,2,2,6,9,4,7,8,4,5,7,8,5,6,9,7,2,4,6, %U A380795 5,8,9,8,6,6,9,7,4,2,7,0,4,6,7,7,0,1,5,0,3,0 %N A380795 Decimal expansion of the smallest acute vertex angles, in radians, in a pentakis dodecahedron face. %C A380795 A pentakis dodecahedron face is an acute isoscele triangle with the smallest angles being this constant and the largest angle being A380796. %H A380795 Paolo Xausa, <a href="/A380795/b380795.txt">Table of n, a(n) for n = 0..10000</a> %H A380795 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PentakisDodecahedron.html">Pentakis Dodecahedron</a>. %H A380795 Wikipedia, <a href="https://en.wikipedia.org/wiki/Pentakis_dodecahedron">Pentakis dodecahedron</a>. %F A380795 Equals arccos((5 - A001622)/6). %F A380795 Equals (Pi - A380796)/2. %e A380795 0.97198502241670672469065747671869944918763790417527... %t A380795 First[RealDigits[ArcCos[(5 - GoldenRatio)/6], 10, 100]] %Y A380795 Cf. A001622, A379132, A379133, A379135, A379136, A380796. %K A380795 nonn,cons,easy %O A380795 0,1 %A A380795 _Paolo Xausa_, Feb 04 2025