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 A341332 #25 Oct 02 2022 00:13:19 %S A341332 9,7,0,8,0,5,5,1,9,3,6,2,7,3,3,2,8,8,6,7,3,4,3,2,8,1,4,9,8,1,3,4,7,9, %T A341332 7,8,8,1,7,3,3,4,9,4,6,9,2,3,0,2,4,1,4,9,7,5,3,6,9,4,1,0,8,4,7,1,0,8, %U A341332 1,3,6,8,5,8,3,2,4,4,8,0,1,6,1,9,0,2,6,8,9,7,5,0,5,9,1,2,5,4,3,0,5,8,2,3 %N A341332 Decimal expansion of Pi/(2*phi). %C A341332 This is the middle angle (in radians) of the unique right triangle whose angles are in geometric progression; common ratio is phi and the angles are (Pi/(2*phi^2), Pi/(2*phi), Pi/2) in radians, corresponding to approximately (34.377, 55.623, 90) in degrees. %H A341332 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %F A341332 Equals A019669/A001622 = A094881/2 = Pi/(1+sqrt(5)) = (Pi/4) * (sqrt(5)-1). %e A341332 0.970805519362733288673432814981347978817334946923024149753694108... %p A341332 evalf(Pi/(1+sqrt(5)),150); %t A341332 RealDigits[Pi/(2*GoldenRatio), 10, 100][[1]] (* _Amiram Eldar_, Feb 09 2021 *) %o A341332 (PARI) Pi/(1+sqrt(5)) \\ _Michel Marcus_, Feb 09 2021 %Y A341332 Cf. A000796 (Pi), A001622 (phi), A019669 (Pi/2), A180014 (Pi/(2*phi^2)). %K A341332 nonn,cons %O A341332 0,1 %A A341332 _Bernard Schott_, Feb 09 2021