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 A195789 #16 Nov 20 2024 23:39:58 %S A195789 1,4,7,1,1,2,7,6,7,4,3,0,3,7,3,4,5,9,1,8,5,2,8,7,5,5,7,1,7,6,1,7,3,0, %T A195789 8,5,1,8,5,5,3,0,6,3,7,7,1,8,3,2,3,8,2,6,2,4,7,1,9,6,3,5,1,9,3,4,3,8, %U A195789 8,0,4,5,5,6,9,5,5,5,3,8,4,4,8,9,3,4,0,4,7,8,8,2,3,6,7,7,2,1,6,2 %N A195789 Decimal expansion of arctan(10). %H A195789 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %F A195789 Equals arcsin(10/sqrt(101)) = arccos(1/sqrt(101)). - _Amiram Eldar_, Jul 11 2023 %e A195789 arctan(10) = 1.471127674303734591852875571761730851855306377... %t A195789 r = 10; %t A195789 N[ArcTan[r], 100] %t A195789 RealDigits[%] (* A195789 *) %t A195789 N[ArcCot[r], 100] %t A195789 RealDigits[%] (* A195790 *) %t A195789 N[ArcSec[r], 100] %t A195789 RealDigits[%] (* A195791 *) %t A195789 N[ArcCsc[r], 100] %t A195789 RealDigits[%] (* A195792 *) %t A195789 RealDigits[ArcTan[10],10,120][[1]] (* _Harvey P. Dale_, Dec 27 2022 *) %o A195789 (PARI) atan(10) \\ _Charles R Greathouse IV_, Mar 24 2021 %Y A195789 Cf. A195790, A195791, A195792, A195793. %K A195789 nonn,cons %O A195789 1,2 %A A195789 _Clark Kimberling_, Sep 24 2011