|
|
A114818
|
|
Indices of Fibonacci numbers with 9 prime factors when counted with multiplicity.
|
|
2
|
|
|
24, 80, 88, 110, 112, 184, 186, 189, 196, 225, 232, 243, 246, 248, 255, 268, 272, 275, 284, 286, 295, 328, 333, 357, 370, 412, 418, 425, 435, 477, 539, 556, 559, 561, 575, 591, 602, 603, 604, 625, 628, 629, 639, 689, 692, 695, 712, 717, 722, 747, 763, 764
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
EXAMPLE
|
a(1)=24 because the 54th Fibonacci number (i.e., 46368) consists of 9 prime factors (i.e., 2*2*2*2*2*3*3*7*23).
|
|
MATHEMATICA
|
t = {}; Do[f = FactorInteger[Fibonacci[n]]; If[Total[Transpose[f][[2]]] == 9, AppendTo[t, n]], {n, 2, 200}]; t (* T. D. Noe, Mar 14 2014 *)
|
|
PROG
|
(PARI) n=1; while(n<330, if(bigomega(fibonacci(n))==9, print1(n, ", ")); n++)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|