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A114814 Indices of Fibonacci numbers with 5 prime factors when counted with multiplicity. 2
18, 44, 45, 57, 63, 68, 69, 76, 91, 98, 111, 118, 124, 125, 134, 141, 169, 172, 183, 185, 201, 202, 203, 213, 218, 229, 247, 253, 267, 302, 303, 329, 335, 347, 363, 371, 373, 377, 381, 382, 386, 395, 398, 413, 415, 439, 443, 461, 497, 501, 529, 547, 563, 579 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..112

Blair Kelly, Fibonacci and Lucas Factorizations.

EXAMPLE

a(1)=18 because 18th fibonacci number(i.e. 2584) consists of 5 prime factors (i.e. 2*2*2*17*19)

MATHEMATICA

t = {}; Do[f = FactorInteger[Fibonacci[n]]; If[Total[Transpose[f][[2]]] == 5, AppendTo[t, n]], {n, 2, 100}]; t (* T. D. Noe, Mar 14 2014 *)

PROG

(PARI) n=1; while(n<385, if(bigomega(fibonacci(n))==5, print1(n, ", ")); n++)

CROSSREFS

Column k=5 of A303215.

Sequence in context: A045264 A297428 A049067 * A299383 A177724 A095739

Adjacent sequences:  A114811 A114812 A114813 * A114815 A114816 A114817

KEYWORD

nonn

AUTHOR

Shyam Sunder Gupta, Feb 19 2006

EXTENSIONS

More terms from Ryan Propper, May 22 2006

STATUS

approved

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Last modified November 11 15:41 EST 2019. Contains 329017 sequences. (Running on oeis4.)