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 A140273 #6 Feb 16 2025 08:33:08 %S A140273 2,1,8,3,3,6,7,7,9,9,1,8,2,4,4,5,2,1,0,0,3,8,5,0,6,1,7,6,0,0,5,4,5,7, %T A140273 1,7,9,5,9,8,2,9,3,5,4,1,0,3,8,2,3,8,3,6,0,6,1,5,8,8,0,2,1,9,6,0,4,8, %U A140273 5,2,2,4,4,6,0,9,0,7,9,6,3,0,8,8,6,5,4,1,9,2,2,8,3,0,2,0,0,2,5,8,7,9,4,1,2 %N A140273 Decimal expansion of 180*arctan(3*sqrt(15)/29)/Pi. %C A140273 The Brocard angle in degrees of the obtuse scalene triangle with sides of lengths 2, 3 and 4, the scalene triangle with least integer side lengths. See formulas in the Weisstein link. %H A140273 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/BrocardAngle.html">Brocard Angle</a>. %F A140273 180*arctan(3*sqrt(15)/29)/Pi = 180*A140272/Pi = 180*arctan(4*A140239/29)/Pi. %e A140273 21.8336779918244521003850617600545717959829354103823836061588021960485224460... %t A140273 RealDigits[180 ArcTan[(3Sqrt[15])/29]/Pi,10,120][[1]] (* _Harvey P. Dale_, Dec 15 2012 *) %o A140273 (PARI) 180*atan(3*sqrt(15)/29)/Pi %Y A140273 Cf. A140272, A140239. %K A140273 cons,nonn %O A140273 2,1 %A A140273 _Rick L. Shepherd_, May 16 2008