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 A195783 #13 Nov 21 2024 07:58:56 %S A195783 1,4,4,5,4,6,8,4,9,5,6,2,6,8,3,1,2,2,2,3,5,6,7,5,4,7,0,5,2,8,2,6,6,6, %T A195783 7,2,4,0,5,0,4,3,6,9,7,2,8,4,8,8,8,0,5,3,5,2,5,3,5,0,8,2,6,5,1,6,7,4, %U A195783 1,4,7,6,3,8,2,9,2,6,0,5,2,9,9,2,9,6,5,5,2,2,1,8,7,8,2,0,2,6,0,7 %N A195783 Decimal expansion of arcsec(8). %H A195783 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %F A195783 From _Amiram Eldar_, May 30 2021: (Start) %F A195783 Equals Pi/2 - A195784. %F A195783 Equals arcsin(3*sqrt(7)/8) = arccos(1/8) = arctan(3*sqrt(7)). (End) %e A195783 arcsec(8)=1.44546849562683122235675470528266672405043697284888... %t A195783 (See A195781.) %t A195783 RealDigits[ArcSec[8],10,120][[1]] (* _Harvey P. Dale_, May 08 2023 *) %o A195783 (PARI) acos(1/8) \\ _Charles R Greathouse IV_, Nov 21 2024 %Y A195783 Cf. A195781, A195784. %K A195783 nonn,cons %O A195783 1,2 %A A195783 _Clark Kimberling_, Sep 24 2011