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 A195721 #24 Nov 20 2024 23:46:10 %S A195721 3,8,7,5,9,6,6,8,6,6,5,5,1,8,0,6,5,3,6,0,2,0,4,6,8,5,5,5,9,1,2,3,6,7, %T A195721 1,2,8,9,9,9,0,8,7,1,7,0,1,1,5,0,1,2,5,7,9,6,4,0,8,2,2,3,0,7,8,8,0,5, %U A195721 8,8,3,8,7,5,1,0,3,9,3,9,9,6,4,9,9,0,3,2,7,9,8,9,2,7,6,4,6,0,4,4,9,8,9,5,6 %N A195721 Decimal expansion of arctan(sqrt(1/6)). %H A195721 G. C. Greubel, <a href="/A195721/b195721.txt">Table of n, a(n) for n = 0..10000</a> %H A195721 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %F A195721 Equals arcsin(sqrt(1/7)) = arccos(sqrt(6/7)). - _Amiram Eldar_, Jul 06 2023 %e A195721 arctan(sqrt(1/6)) = 0.387596686655180... %t A195721 RealDigits[ArcTan[Sqrt[1/6]],10,120][[1]] (* _Harvey P. Dale_, Nov 09 2011 *) %o A195721 (PARI) atan(sqrt(1/6)) \\ _G. C. Greubel_, Aug 20 2018 %o A195721 (Magma) SetDefaultRealField(RealField(100)); Arctan(Sqrt(1/6)); // _G. C. Greubel_, Aug 20 2018 %Y A195721 Cf. A195720. %K A195721 nonn,cons %O A195721 0,1 %A A195721 _Clark Kimberling_, Sep 23 2011 %E A195721 Corrected by _Harvey P. Dale_, Nov 09 2011