login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A075731 Fibonacci numbers F(k) for k squarefree (A005117). 1
1, 1, 2, 5, 8, 13, 55, 89, 233, 377, 610, 1597, 4181, 10946, 17711, 28657, 121393, 514229, 832040, 1346269, 3524578, 5702887, 9227465, 24157817, 39088169, 63245986, 165580141, 267914296, 433494437, 1836311903, 2971215073 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..31.

EXAMPLE

10 is squarefree and fibonacci(10)=55, 11 is squarefree and fibonacci(11)=89.

MAPLE

with(combinat, fibonacci): fib_dsk := proc(n); if (numtheory[issqrfree](n)='true') then RETURN(fibonacci(n)); fi; end: seq(fib_dsk(i), i=1..100);

CROSSREFS

Cf. A000045, A005117, A061305.

Sequence in context: A076180 A229898 A200275 * A009238 A009203 A202273

Adjacent sequences:  A075728 A075729 A075730 * A075732 A075733 A075734

KEYWORD

easy,nonn

AUTHOR

Jani Melik, Oct 07 2002

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 25 03:50 EDT 2019. Contains 321450 sequences. (Running on oeis4.)