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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A073958 Fibonacci numbers for which the number of prime factors (with multiplicity) is a Fibonacci number. 0
1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 233, 377, 610, 987, 1597, 2584, 4181, 10946, 17711, 28657, 75025, 121393, 514229, 1346269, 3524578, 5702887, 9227465, 24157817, 39088169, 63245986, 165580141, 433494437 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

The prime Fibonacci numbers, A005478, are a subsequence.

EXAMPLE

Example: 8=2*2*2, the number of prime factors is equal to 3, a Fibonacci number.

MATHEMATICA

With[{fibs=Fibonacci[Range[0, 50]]}, Rest[Select[fibs, MemberQ[fibs, PrimeOmega[#]]&]]] (* From Harvey P. Dale, Oct 27 2011 *)

CROSSREFS

Cf. A000045.

Sequence in context: A069041 A177372 A109609 * A074317 A077371 A077372

Adjacent sequences:  A073955 A073956 A073957 * A073959 A073960 A073961

KEYWORD

easy,nice,nonn

AUTHOR

Felice Russo (frusso(AT)micron.com), Sep 03 2002

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 17 00:09 EST 2012. Contains 205978 sequences.