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 A195727 #28 Nov 22 2024 11:32:54
%S A195727 2,4,4,9,7,8,6,6,3,1,2,6,8,6,4,1,5,4,1,7,2,0,8,2,4,8,1,2,1,1,2,7,5,8,
%T A195727 1,0,9,1,4,1,4,4,0,9,8,3,8,1,1,8,4,0,6,7,1,2,7,3,7,5,9,1,4,6,6,7,3,5,
%U A195727 5,1,1,9,5,8,7,6,4,2,0,9,6,5,7,4,5,3,4,1,5,7,6,6,8,7,0,1,9,9,1,3
%N A195727 Decimal expansion of arccot(4).
%H A195727 G. C. Greubel, <a href="/A195727/b195727.txt">Table of n, a(n) for n = 0..10000</a>
%H A195727 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>
%F A195727 Equals Integral_{x >= 0} exp(-4*x)*sin(x)/x dx. - _Peter Bala_, Nov 05 2019
%F A195727 Equals arcsin(1/sqrt(17)) = arccos(4/sqrt(17)) = arctan(1/4). - _Amiram Eldar_, Jul 11 2023
%e A195727 arccot(4) = 0.24497866312686...
%t A195727 (See A195628.)
%t A195727 RealDigits[ArcCot[4],10,120][[1]] (* _Harvey P. Dale_, Jan 09 2015 *)
%o A195727 (PARI) atan(1/4) \\ _G. C. Greubel_, Aug 20 2018
%o A195727 (Magma) SetDefaultRealField(RealField(100)); Arccot(4); // _G. C. Greubel_, Aug 20 2018
%Y A195727 Cf. A195628.
%K A195727 nonn,cons
%O A195727 0,1
%A A195727 _Clark Kimberling_, Sep 23 2011