id:A078479 - OEIS Search Results

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a(1)=1, a(n+1)=a(spf(n))+a(gpf(n)), where spf(n) and gpf(n) are the smallest and greatest prime factors of n (A020639, A006530).

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1, 2, 4, 8, 4, 8, 6, 12, 4, 8, 6, 12, 6, 12, 8, 8, 4, 8, 6, 12, 6, 10, 8, 16, 6, 8, 8, 8, 8, 16, 6, 12, 4, 10, 6, 10, 6, 12, 8, 10, 6, 12, 8, 16, 8, 8, 10, 20, 6, 12, 6, 8, 8, 16, 6, 10, 8, 10, 10, 20, 6, 12, 8, 10, 4, 10, 8, 16, 6, 12, 8, 16, 6, 12, 8, 8, 8, 12, 8, 16, 6, 8, 8, 16, 8, 8, 10, 12 (list; graph; listen)

	OFFSET	`1,2`
	CROSSREFS	`Sequence in context: A059884 A021805 A031401 this_sequence A060968 A016635 A133992` `Adjacent sequences: A078476 A078477 A078478 this_sequence A078480 A078481 A078482`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 03 2003`

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Last modified September 8 13:03 EDT 2008. Contains 143486 sequences.

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