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!)
A190647 Continued fraction expansion of Sum_{k>=1} (-1)^k/Fibonacci(k)^2. 1

%I #14 Feb 18 2019 02:12:12

%S -1,1,4,1,30,1,870,1,9,5,1,12,1,14,1,1,1,1,2,4,1,40,1,9,13,8,35,1,8,3,

%T 1,1,10,4,15,3,1,6,6,1,4,1,4,1,9,6,7,1,4,20,3,2,1,3,1,9,1,2,2,1,1,1,2,

%U 1,1,1,1,3,4,2,18,3,1,1,1,1,1,4,53,4,5,1

%N Continued fraction expansion of Sum_{k>=1} (-1)^k/Fibonacci(k)^2.

%C Borwein et al. express the sum in terms of theta function.

%D J. M. Borwein, D. H. Bailey and R. Girgensohn, Experimentation in Mathematics, A K Peters, Ltd., Natick, MA, 2004. x+357 pp. See p. 203.

%e -0.16753929845562511832413984100914483853736687...

%p with(combinat): with(numtheory): fibcons := add((-1)^k/fibonacci(k)^2,k=1..500): op(cfrac(fibcons,105,'quotients')); # _Nathaniel Johnston_, May 24 2011

%Y Cf. A190648.

%K cofr,sign

%O 0,3

%A _N. J. A. Sloane_, May 16 2011

%E More terms from _Nathaniel Johnston_, May 24 2011

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 25 16:23 EDT 2024. Contains 371989 sequences. (Running on oeis4.)