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!)
A175026 Fibonacci entry points: a(n) = smallest m such that prime(A075702(n)) divides Fibonacci(m). 1
432, 127, 1426, 10488, 63221, 1328, 11136, 1291186 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
In all cases, a(n) is one of divisors of (A075702(n)):
{2160,3048,27094,251712,505768,936240,2182656,2582372}/
{432,127,1426,10488,63221,1328,11136,1291186} = {5,24,19,24,8,705,196,2}.
This is used in Mathematica code for faster search.
LINKS
FORMULA
a(n)=A001602(A075702(n)).
EXAMPLE
a(1)=432 because A075702(1)=2160=5*432, prime(2160)=19009, and F(432)/19009= 45104130506533126693784341438185160821786395872599778181861900641867287643757057395776.
MATHEMATICA
s={2160, 3048, 27094, 251712, 505768, 936240, 2182656, 2582372};
Do[sk=s[[k]]; dv=Divisors[sk]; i=2; While[Mod[Fibonacci[dvi=dv[[i]]], Prime[sk]]>0, i++ ]; Print[dvi], {k, 8}]
CROSSREFS
Sequence in context: A048961 A301645 A063463 * A205192 A066419 A245469
KEYWORD
nonn
AUTHOR
Zak Seidov, Nov 03 2009
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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 18 09:18 EDT 2024. Contains 374378 sequences. (Running on oeis4.)