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 A195711 #20 Nov 21 2024 07:56:36 %S A195711 2,4,8,2,5,3,4,6,1,7,7,6,3,3,8,4,2,5,5,5,8,9,8,1,1,2,5,5,9,5,6,4,8,2, %T A195711 6,4,9,2,7,3,9,7,3,9,1,6,0,7,9,7,4,8,4,6,2,5,4,8,1,7,0,3,3,3,6,0,1,1, %U A195711 4,9,8,3,4,9,5,5,1,6,7,3,6,0,1,7,6,9,0,0,4,9,0,1,2,0,5,9,5,1,0,1 %N A195711 Decimal expansion of arccos(-sqrt(5/8)). %H A195711 G. C. Greubel, <a href="/A195711/b195711.txt">Table of n, a(n) for n = 1..10000</a> %H A195711 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %F A195711 Equals Pi - arcsin(sqrt(3/8)) = Pi - arctan(sqrt(3/5)). - _Amiram Eldar_, Jul 06 2023 %e A195711 2.48253461776338... %t A195711 (See A195707.) %t A195711 RealDigits[ArcCos[-Sqrt[(5/8)]],10,120][[1]] (* _Harvey P. Dale_, Mar 12 2013 *) %o A195711 (PARI) acos(-sqrt(5/8)) \\ _G. C. Greubel_, Aug 19 2018 %o A195711 (Magma) SetDefaultRealField(RealField(100)); Arccos(-Sqrt(5/8)); // _G. C. Greubel_, Aug 19 2018 %Y A195711 Cf. A195707. %K A195711 nonn,cons %O A195711 1,1 %A A195711 _Clark Kimberling_, Sep 23 2011