A033031 - OEIS

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A033031

Squarefree kernels of 3-smooth numbers.

1, 2, 3, 2, 6, 2, 3, 6, 2, 6, 6, 3, 2, 6, 6, 6, 2, 6, 3, 6, 6, 2, 6, 6, 6, 6, 3, 2, 6, 6, 6, 6, 6, 2, 6, 6, 3, 6, 6, 6, 2, 6, 6, 6, 6, 6, 6, 2, 3, 6, 6, 6, 6, 6, 6, 2, 6, 6, 6, 6, 6, 3, 6, 6, 2, 6, 6, 6, 6, 6, 6, 6, 6, 2, 6, 6, 3, 6, 6, 6, 6, 6, 6, 2, 6, 6, 6, 6, 6, 6, 6, 6, 3, 6, 2, 6, 6, 6, 6, 6, 6, 6 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	COMMENTS	`a(n) = A007947(A003586(n)).` `a(n) = (20^(A022328(n)-1)) (3*0^(A022329(n)-1)) for n>1. - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 18 2003`
	EXAMPLE	`A003586(17) = 64 = 2^6 -> a(17) = 2,` `A003586(18) = 72 = 2^3 * 3^2 -> a(18) = 2*3 = 6,` `A003586(19) = 81 = 3^4 -> a(19) = 3.`
	CROSSREFS	`Sequence in context: A078599 A183103 A183105 * A134060 A197289 A161888` `Adjacent sequences: A033028 A033029 A033030 * A033032 A033033 A033034`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jun 21 2003`

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Last modified February 16 03:44 EST 2012. Contains 205860 sequences.