login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A206096 Fibonacci numbers with 4 distinct prime divisors, each of multiplicity 1. 1
6765, 196418, 317811, 2178309, 32951280099, 139583862445, 1304969544928657, 5527939700884757, 259695496911122585, 679891637638612258, 12200160415121876738, 83621143489848422977, 483162952612010163284885, 22698374052006863956975682 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Intersection of A000045 and A046386. - Michel Marcus, Sep 11 2014

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..36

MAPLE

filter:= proc(t)

local F;

F:= ifactors(t)[2];

map(f -> f[2], F) = [1, 1, 1, 1];

end proc:

select(filter, [seq(combinat:-fibonacci(n), n=1..200)]); # Robert Israel, Sep 07 2014

MATHEMATICA

Select[Fibonacci[Range[200]], Last/@FactorInteger[#]=={1, 1, 1, 1}&]

PROG

(PARI)

Vec(select(k -> omega(k)==4 && bigomega(k)==4, vector(100, i, fibonacci(i)))) \\ Edward Jiang, Sep 11 2014

CROSSREFS

Cf. A000045, A053409, A137563

Sequence in context: A151637 A031986 A147316 * A238911 A031832 A200436

Adjacent sequences:  A206093 A206094 A206095 * A206097 A206098 A206099

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, Feb 03 2012

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 January 20 23:16 EST 2020. Contains 331104 sequences. (Running on oeis4.)