A075731 - OEIS

A075731

Fibonacci numbers F(k) for k squarefree (A005117).

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

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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: A326506 A229898 A200275 * A009238 A009203 A363734

Adjacent sequences: A075728 A075729 A075730 * A075732 A075733 A075734

KEYWORD

easy,nonn

AUTHOR

Jani Melik, Oct 07 2002

STATUS

approved