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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A250743 Numerator of the harmonic mean of the first n positive Fibonacci numbers. 2
 1, 1, 6, 24, 150, 720, 1560, 87360, 1670760, 20420400, 1999157160, 13085392320, 3302971111440, 103154328557280, 1348374437570160, 67598505136850688, 114701988497522458032, 2307534121538392979232, 10183789060049355548733936 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Colin Barker, Table of n, a(n) for n = 1..120 EXAMPLE a(4) = 24 because the first 4 positive Fibonacci numbers are [1,1,2,3], and 4/(1/1+1/1+1/2+1/3) = 24/17. PROG (PARI) s=vector(30); f=Vec(x/(1-x-x^2)+O(x^(#s+1))); n=d=0; for(k=1, #s, n++; d+=1/f[k]; s[k]=numerator(n/d)); s CROSSREFS Cf. A000045 (Fibonacci numbers), A250744 (denominators). Sequence in context: A188330 A126267 A026947 * A265883 A330498 A165491 Adjacent sequences:  A250740 A250741 A250742 * A250744 A250745 A250746 KEYWORD nonn,frac AUTHOR Colin Barker, Nov 27 2014 STATUS approved

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.

Last modified May 15 23:51 EDT 2022. Contains 353687 sequences. (Running on oeis4.)