id:A114843 - OEIS Search Results

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Indices of Fibonacci numbers with 4 distinct prime factors.

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20, 24, 27, 28, 32, 52, 55, 74, 77, 85, 87, 91, 93, 97, 115, 123, 143, 146, 149, 157, 161, 163, 178, 187, 197, 209, 211, 214, 215, 221, 223, 239, 242, 249, 262, 269, 283, 287, 307, 311, 313, 321, 334, 349, 379, 391, 393, 409, 421, 453, 487, 493, 499, 523, 581 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`Blair Kelly, Fibonacci and Lucas Factorizations.`
	EXAMPLE	`a(1)=20 because 20th fibonacci number consists of 4 distinct prime factors (i.e. 6765 = 3 x 5 x 11 x 41)`
	PROGRAM	`(PARI) n=1; while(n<350, if(omega(fibonacci(n))==4, print1(n, ", ")); n++)`
	CROSSREFS	`Sequence in context: A117737 A062908 A111323 this_sequence A015924 A108373 A109131` `Adjacent sequences: A114840 A114841 A114842 this_sequence A114844 A114845 A114846`
	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 November 18 20:14 EST 2008. Contains 147244 sequences.

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