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Search: id:A137563
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| A137563 |
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Fibonacci numbers with three distinct prime divisors. |
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+0
1
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| 610, 987, 2584, 10946, 3524578, 9227465, 24157817, 39088169, 63245986, 1836311903, 7778742049, 20365011074, 591286729879, 4052739537881, 17167680177565, 44945570212853, 61305790721611591, 420196140727489673
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Ron Knott, Fibonacci Numbers.
Ron Knott, Prime divisors of Fibonacci numbers.
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EXAMPLE
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The distinct prime divisors of the Fibonacci number 610 are 2, 5 and 61.
The distinct prime divisors of the Fibonacci number 44945570212853 are 269,116849 and 1429913.
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MAPLE
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with(numtheory): with(combinat): a:=proc(n) if nops(factorset(fibonacci(n)))= 3 then fibonacci(n) else end if end proc: seq(a(n), n=1..110); - Emeric Deutsch (deutsch(AT)duke.poly.edu), May 18 2008
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CROSSREFS
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Cf. A000045, A053409.
Sequence in context: A096525 A142554 A027514 this_sequence A090177 A120719 A045730
Adjacent sequences: A137560 A137561 A137562 this_sequence A137564 A137565 A137566
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KEYWORD
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nonn
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AUTHOR
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Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Apr 25 2008
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), May 18 2008
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