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A054495 Smallest k such that n/k is a Fibonacci number. 5
1, 1, 1, 2, 1, 2, 7, 1, 3, 2, 11, 4, 1, 7, 3, 2, 17, 6, 19, 4, 1, 11, 23, 3, 5, 2, 9, 14, 29, 6, 31, 4, 11, 1, 7, 12, 37, 19, 3, 5, 41, 2, 43, 22, 9, 23, 47, 6, 49, 10, 17, 4, 53, 18, 1, 7, 19, 29, 59, 12, 61, 31, 3, 8, 5, 22, 67, 2, 23, 14, 71, 9, 73, 37, 15, 38, 77, 6, 79, 10, 27, 41 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

FORMULA

a(n)=n/A054494(n). [Corrected by Charles R Greathouse IV, Nov 05 2014]

EXAMPLE

a(10)=2 because 10/1=10 is not a Fibonacci number but 10/2=5 is.

PROG

(PARI) A010056(n)=my(k=n^2); k+=(k+1)<<2; issquare(k) || (n>0 && issquare(k-8))

a(n)=fordiv(n, d, if(A010056(n/d), return(d))) \\ Charles R Greathouse IV, Nov 05 2014

CROSSREFS

Cf. A000045, A010056, A005086, A037943.

Sequence in context: A212671 A131057 A051852 * A007966 A224609 A278710

Adjacent sequences:  A054492 A054493 A054494 * A054496 A054497 A054498

KEYWORD

easy,nonn

AUTHOR

Henry Bottomley, Apr 04 2000

EXTENSIONS

a(34), a(55), a(68) corrected by Charles R Greathouse IV, Nov 06 2014

STATUS

approved

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Last modified April 8 22:35 EDT 2020. Contains 333331 sequences. (Running on oeis4.)