|
%I #25 Sep 12 2014 07:49:23
%S 6765,196418,317811,2178309,32951280099,139583862445,1304969544928657,
%T 5527939700884757,259695496911122585,679891637638612258,
%U 12200160415121876738,83621143489848422977,483162952612010163284885,22698374052006863956975682
%N Fibonacci numbers with 4 distinct prime divisors, each of multiplicity 1.
%C Intersection of A000045 and A046386. - _Michel Marcus_, Sep 11 2014
%H Vincenzo Librandi, <a href="/A206096/b206096.txt">Table of n, a(n) for n = 1..36</a>
%p filter:= proc(t)
%p local F;
%p F:= ifactors(t)[2];
%p map(f -> f[2],F) = [1,1,1,1];
%p end proc:
%p select(filter, [seq(combinat:-fibonacci(n),n=1..200)]); # _Robert Israel_, Sep 07 2014
%t Select[Fibonacci[Range[200]],Last/@FactorInteger[#]=={1,1,1,1}&]
%o (PARI)
%o Vec(select(k -> omega(k)==4 && bigomega(k)==4, vector(100, i, fibonacci(i)))) \\ _Edward Jiang_, Sep 11 2014
%Y Cf. A000045, A053409, A137563
%K nonn
%O 1,1
%A _Vladimir Joseph Stephan Orlovsky_, Feb 03 2012
|
