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 A380942 #7 Feb 09 2025 20:07:30 %S A380942 1,5,5,3,1,9,9,9,5,0,5,7,4,0,7,6,2,3,2,3,1,8,3,9,1,2,0,4,6,0,7,0,9,4, %T A380942 9,9,9,0,5,1,9,3,6,4,5,1,7,9,5,6,0,3,3,1,4,5,3,7,8,8,3,7,6,4,5,8,0,9, %U A380942 6,7,0,6,3,4,6,5,1,1,1,1,4,9,3,9,0,8,5,2,6,6 %N A380942 Decimal expansion of the largest vertex angle, in radians, in a disdyakis triacontahedron face. %C A380942 A disdyakis triacontahedron face is a scalene triangle with three acute angles. %H A380942 Paolo Xausa, <a href="/A380942/b380942.txt">Table of n, a(n) for n = 1..10000</a> %H A380942 Wikipedia, <a href="https://en.wikipedia.org/wiki/Disdyakis_triacontahedron">Disdyakis triacontahedron</a>. %F A380942 Equals arccos((7 - 4*A001622)/30). %F A380942 Equals Pi - A380940 - A380941. %e A380942 1.5531999505740762323183912046070949990519364517956... %t A380942 First[RealDigits[ArcCos[(7 - 4*GoldenRatio)/30], 10, 100]] %Y A380942 Cf. A380940 (smallest face angle), A380941 (middle face angle). %Y A380942 Cf. A001622, A379388, A379708, A379709, A379710, A379711. %K A380942 nonn,cons,easy %O A380942 1,2 %A A380942 _Paolo Xausa_, Feb 09 2025