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A033031 Squarefree kernels of 3-smooth numbers. 0
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) = (2*0^(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.