login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A159570 Continued fraction for 1/(sqrt(2)G), where G is Gauss's constant A014549. 1

%I #11 Sep 08 2022 08:45:44

%S 0,1,5,1,1,5,20,1,13,2,1,1,61,1,1,2,4,1,3,1,2,1,5,1,13,1,11,7,6,2,77,

%T 7,1,5,4,8,1,1,6,4,2,1,1,2,4,1,1,2,1,3,1,1,6,6,1,7,1,10,1,1,4,1,4,2,1,

%U 7,1,4,1,2,17,2,2,1,5,2,1,2,1,1,1,3,3,1,1,6,1,1,16,3,1320,2,2,7,5,9,1,217,3

%N Continued fraction for 1/(sqrt(2)G), where G is Gauss's constant A014549.

%C Also called the Ubiquitous Constant.

%H Harry J. Smith, <a href="/A159570/b159570.txt">Table of n, a(n) for n = 0..20000</a>

%F The Ubiquitous Constant = agm(1, sqrt(1/2)) = BetaC(0.75, 0.75) / 2 = Gam(0.75)*Gam(0.75)/(2*Gam(1.5).

%e 0.847213084793979086606499123... = 0 + 1/(1 + 1/(5 + 1/(1 + 1/(1 + ...))))

%t ContinuedFraction[2*Pi^(3/2)/Gamma[1/4]^2, 100] (* _G. C. Greubel_, Sep 28 2018 *)

%o (PARI) { allocatemem(932245000); default(realprecision, 21000); x=contfrac(agm(1, sqrt(1/2))); for (n=0, 20000, write("b159570.txt", n, " ", x[n+1])); }

%o (PARI) default(realprecision, 100); contfrac(2*Pi^(3/2)/gamma(1/4)^2) \\ _G. C. Greubel_, Sep 28 2018

%o (Magma) SetDefaultRealField(RealField(100)); R:= RealField(); ContinuedFraction(2*Pi(R)^(3/2)/Gamma(1/4)^2); // _G. C. Greubel_, Sep 28 2018

%K nonn

%O 0,3

%A _Harry J. Smith_, Apr 16 2009

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)