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 A195726 #15 Nov 21 2024 07:55:14 %S A195726 2,7,2,1,0,5,8,3,1,8,3,0,5,8,2,8,1,1,0,5,7,4,3,8,0,8,6,7,3,6,6,2,8,7, %T A195726 5,1,0,8,4,6,1,3,0,0,0,6,5,5,5,1,8,6,2,1,1,0,8,5,6,8,3,1,8,9,9,6,1,7, %U A195726 7,1,7,5,4,5,4,8,0,4,0,3,1,8,3,6,8,7,6,7,8,2,2,9,1,6,3,2,4,5,5,1 %N A195726 Decimal expansion of arccos(-sqrt(5/6)). %H A195726 G. C. Greubel, <a href="/A195726/b195726.txt">Table of n, a(n) for n = 1..10000</a> %H A195726 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %F A195726 Equals Pi - arcsin(sqrt(1/6)) = Pi - arctan(sqrt(1/5)). - _Amiram Eldar_, Jul 10 2023 %e A195726 arccos(-sqrt(5/6)) = 2.72105831830582... %t A195726 r = Sqrt[5/6]; %t A195726 N[ArcCos[-r], 100] %t A195726 RealDigits[%] %o A195726 (PARI) acos(-sqrt(5/6)) \\ _G. C. Greubel_, Aug 20 2018 %o A195726 (Magma) SetDefaultRealField(RealField(100)); Arccos(-Sqrt(5/6)); // _G. C. Greubel_, Aug 20 2018 %Y A195726 Cf. A195725. %K A195726 nonn,cons %O A195726 1,1 %A A195726 _Clark Kimberling_, Sep 23 2011