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A114841 Indices of Fibonacci numbers with 3 distinct prime factors. 3
15, 16, 18, 21, 33, 35, 37, 38, 39, 46, 49, 51, 58, 62, 65, 67, 82, 86, 103, 106, 119, 122, 125, 139, 142, 145, 158, 166, 179, 181, 226, 233, 235, 241, 257, 263, 274, 281, 299, 301, 317, 337, 383, 389, 419, 457, 463, 473, 479, 491, 521, 541, 557, 619, 643, 659 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

Blair Kelly, Fibonacci and Lucas Factorizations.

EXAMPLE

a(1)=15 because 15th fibonacci number consists of 3 distinct prime factors (i.e. 610 = 2 x 5 x 61)

PROG

(PARI) n=1; while(n<340, if(omega(fibonacci(n))==3, print1(n, ", ")); n++)

CROSSREFS

Sequence in context: A090461 A138598 A160661 * A031168 A108856 A039689

Adjacent sequences:  A114838 A114839 A114840 * A114842 A114843 A114844

KEYWORD

nonn

AUTHOR

Shyam Sunder Gupta (guptass(AT)rediffmail.com), Feb 19 2006

EXTENSIONS

More terms from Ryan Propper (rpropper(AT)stanford.edu), Apr 26 2006

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Last modified February 14 20:13 EST 2012. Contains 205663 sequences.