A114819 Indices of Fibonacci numbers with 10 prime factors when counted with multiplicity.
36, 100, 114, 165, 174, 256, 266, 273, 282, 296, 304, 322, 325, 366, 369, 376, 406, 424, 428, 429, 484, 494, 506, 574, 578, 589, 633, 637, 642, 646, 652, 658, 663, 664, 668, 669, 670, 687, 705, 716, 724, 742, 754, 779, 782, 807, 845, 892, 909, 921, 946, 956
Offset: 1
Keywords
Examples
a(1)=36 because the 36th Fibonacci number (i.e., 14930352) consists of 10 prime factors (i.e., 2*2*2*2*3*3*3*17*19*107).
Links
- Amiram Eldar, Table of n, a(n) for n = 1..71
- Blair Kelly, Fibonacci and Lucas Factorizations.
Crossrefs
Column k=10 of A303215.
Programs
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Mathematica
t = {}; Do[f = FactorInteger[Fibonacci[n]]; If[Total[Transpose[f][[2]]] == 10, AppendTo[t, n]], {n, 2, 200}]; t (* T. D. Noe, Mar 14 2014 *) Select[Range[1000],PrimeOmega[Fibonacci[#]]==10&] (* Harvey P. Dale, Jul 24 2021 *)
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PARI
n=1;while(n<305,if(bigomega(fibonacci(n))==10,print1(n,", "));n++)
Extensions
More terms from Ryan Propper, May 24 2006