id:A098548 - OEIS Search Results

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a(n) = if n<=3 then n else (smallest number greater than a(n-1) having at least one common factor with a(n-2), but none with a(n-1)).

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	OFFSET	`1,2`
	COMMENT	`A098549(n) = a(a(n)).`
	CROSSREFS	`Cf. A098550.` `Adjacent sequences: A098545 A098546 A098547 this_sequence A098549 A098550 A098551` `Sequence in context: A098551 A128944 A127150 this_sequence A076963 A081871 A068334`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 14 2004`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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