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 A195769 #13 Nov 20 2024 23:41:37 %S A195769 1,3,7,3,4,0,0,7,6,6,9,4,5,0,1,5,8,6,0,8,6,1,2,7,1,9,2,6,4,4,4,9,6,1, %T A195769 1,4,8,6,5,0,9,9,9,5,9,5,8,9,9,7,0,0,8,0,8,9,6,9,7,8,3,3,5,5,9,1,2,8, %U A195769 7,4,2,3,3,1,6,4,8,6,0,7,1,3,5,8,1,3,1,9,5,8,4,6,3,3,7,7,0,4,8,9 %N A195769 Decimal expansion of arctan(5). %H A195769 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %F A195769 Equals arcsin(5/sqrt(26)) = arccos(1/sqrt(26)). - _Amiram Eldar_, Jul 11 2023 %e A195769 arctan(5) = 1.373400766945015860861271926444961148650999... %t A195769 r = 5; %t A195769 N[ArcTan[r], 100] %t A195769 RealDigits[%] (* A195769 *) %t A195769 N[ArcCot[r], 100] %t A195769 RealDigits[%] (* A105532 *) %t A195769 N[ArcSec[r], 100] %t A195769 RealDigits[%] (* A195771 *) %t A195769 N[ArcCsc[r], 100] %t A195769 RealDigits[%] (* A195772 *) %o A195769 (PARI) atan(5) \\ _Charles R Greathouse IV_, Nov 20 2024 %Y A195769 Cf. A105532, A195771, A195772. %K A195769 nonn,cons %O A195769 1,2 %A A195769 _Clark Kimberling_, Sep 24 2011