A247240 Numbers such that A059248(k), the numerator of Sum_{i=1..k} 1/Fibonacci(i), is not equal to A250744(k), the denominator of the harmonic mean of the first k positive Fibonacci numbers.

2, 7, 35, 245, 485, 12914

Offset

1,1

Comments

Next term > 20000. - Jinyuan Wang, Feb 14 2020

Links

Table of n, a(n) for n=1..6.

Mathematica

s=0; lst={}; Do[s+=1/Fibonacci[n]; If[Numerator[s]!=Denominator[n/s], AppendTo[lst, n]], {n, 10000}]; lst (* Jinyuan Wang, Feb 14 2020 *)

Crossrefs

Cf. A059248, A250744.

Sequence in context: A058129 A101514 A380843 * A266356 A196857 A111908

Adjacent sequences: A247237 A247238 A247239 * A247241 A247242 A247243

Keyword

nonn,more

Author

Michel Marcus, Nov 28 2014

Extensions

a(6) from Jinyuan Wang, Feb 14 2020

Status

approved