A218873 Denominator of Sum_{i = Fibonacci(n-1)+1..Fibonacci(n)} 1/i.

1, 1, 2, 3, 20, 168, 25740, 1627920, 7600186994400, 91351145008363640400, 41220780807793167133364240240011200, 86885947737342403570395603462501113422055643279216000

Offset

1,3

References

Chen, Hongwei; Kennedy, Chris. Harmonic series meets Fibonacci sequence. College Math. J. 43 (2012), no. 3, 237--243. MR2916493

Links

Table of n, a(n) for n=1..12.

Example

1, 0, 1/2, 1/3, 9/20, 73/168, 11899/25740, 757349/1627920, 3593758191731/7600186994400, 43428537271777524533/91351145008363640400, ...

Crossrefs

Cf. A000045, A001008, A002805, A218872.

Sequence in context: A356884 A009721 A013340 * A012416 A261317 A353921

Adjacent sequences: A218870 A218871 A218872 * A218874 A218875 A218876

Keyword

nonn,frac

Author

N. J. A. Sloane, Nov 09 2012

Status

approved