This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A158933 Decimal expansion of sum{n>=1}((-1)^(n+1))*1/F(n) where F(n) is the n-th Fibonacci number A000045(n). 2
 2, 8, 9, 1, 4, 4, 6, 4, 8, 5, 7, 0, 6, 7, 1, 5, 8, 3, 1, 1, 2, 3, 0, 5, 5, 0, 9, 6, 1, 5, 7, 2, 9, 1, 6, 6, 9, 5, 4, 8, 8, 1, 9, 5, 1, 5, 8, 9, 6, 9, 1, 3, 6, 0, 0, 2, 5, 0, 2, 6, 4, 8, 5, 0, 6, 3, 0, 3, 5, 7, 6, 1, 7, 3, 8, 8, 6, 4, 5, 5, 1, 5, 8, 2, 4, 1, 1, 5, 8, 3, 1, 8, 2, 8, 5 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Eric W. Weisstein, MathWorld: Reciprocal Fibonacci Constant EXAMPLE .2891446485706715831123055096157291669... MAPLE with(combinat, fibonacci):Digits:=100:s:=0:for n from 1 to 2000 do: a1:=fibonacci(n):s:=s+evalf(1/a1)*(-1)^(n+1):od:print(s): MATHEMATICA digits = 95; NSum[(-1)^(n+1)*(1/Fibonacci[n]), {n, 1, Infinity}, WorkingPrecision -> digits+1, NSumTerms -> digits] // RealDigits[#, 10, digits]& // First (* Jean-François Alcover, Jan 28 2014 *) PROG (PARI) -sumalt(n=1, (-1)^n/fibonacci(n)) \\ Charles R Greathouse IV, Oct 03 2016 CROSSREFS Cf. A079586, A000045. Sequence in context: A016641 A155748 A152748 * A200502 A316138 A011062 Adjacent sequences:  A158930 A158931 A158932 * A158934 A158935 A158936 KEYWORD nonn,cons AUTHOR Michel Lagneau, Mar 26 2011 EXTENSIONS Offset corrected by Arkadiusz Wesolowski, Jun 28 2011 STATUS approved

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

Last modified August 22 20:47 EDT 2019. Contains 326209 sequences. (Running on oeis4.)