id:A087039 - OEIS Search Results

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If n is prime then 1 else 2nd largest prime factor of n.

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1, 1, 1, 2, 1, 2, 1, 2, 3, 2, 1, 2, 1, 2, 3, 2, 1, 3, 1, 2, 3, 2, 1, 2, 5, 2, 3, 2, 1, 3, 1, 2, 3, 2, 5, 3, 1, 2, 3, 2, 1, 3, 1, 2, 3, 2, 1, 2, 7, 5, 3, 2, 1, 3, 5, 2, 3, 2, 1, 3, 1, 2, 3, 2, 5, 3, 1, 2, 3, 5, 1, 3, 1, 2, 5, 2, 7, 3, 1, 2, 3, 2, 1, 3, 5, 2, 3, 2, 1, 3, 7, 2, 3, 2, 5, 2, 1, 7, 3, 5, 1, 3 (list; graph; listen)

	OFFSET	`1,4`
	COMMENT	`a(n) = A006530(A052126(n)) = A006530(n/A006530(n));` `A087040(n) = a(A002808(n)).`
	LINKS	`Eric Weisstein's World of Mathematics, Greatest Prime Factor`
	CROSSREFS	`Sequence in context: A082067 A082061 A107286 this_sequence A102096 A137866 A072203` `Adjacent sequences: A087036 A087037 A087038 this_sequence A087040 A087041 A087042`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Aug 01 2003`

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Last modified July 23 17:35 EDT 2008. Contains 142285 sequences.

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