

A117730


Numbers for which the largest proper divisor is a Fibonacci number.


0



2, 3, 4, 5, 6, 7, 9, 10, 11, 13, 15, 16, 17, 19, 23, 25, 26, 29, 31, 37, 39, 41, 42, 43, 47, 53, 59, 61, 63, 65, 67, 68, 71, 73, 79, 83, 89, 91, 97, 101, 103, 107, 109, 110, 113, 127, 131, 137, 139, 143, 149, 151, 157, 163, 165, 167, 169, 173, 178, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229
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OFFSET

0,1


LINKS

Table of n, a(n) for n=0..68.


EXAMPLE

275 is in the sequence because the largest proper divisor is 55 and 55 is a Fibonacci number.


MATHEMATICA

fibs=Fibonacci[Range[25]]; Select[Range[2, 500], MemberQ[fibs, Last[Most[Divisors[#]]]]&] [From Harvey P. Dale, Dec. 20, 2010]


CROSSREFS

Cf. A000040, A000045.
Sequence in context: A033948 A285514 A193838 * A174328 A272570 A123101
Adjacent sequences: A117727 A117728 A117729 * A117731 A117732 A117733


KEYWORD

nonn


AUTHOR

Luc Stevens (lms022(AT)yahoo.com), Apr 13 2006


EXTENSIONS

Corrected and additional terms provided by Harvey P. Dale, Dec. 20, 2010


STATUS

approved



