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A086411 Greatest prime factor of 3-smooth numbers. 5
1, 2, 3, 2, 3, 2, 3, 3, 2, 3, 3, 3, 2, 3, 3, 3, 2, 3, 3, 3, 3, 2, 3, 3, 3, 3, 3, 2, 3, 3, 3, 3, 3, 2, 3, 3, 3, 3, 3, 3, 2, 3, 3, 3, 3, 3, 3, 2, 3, 3, 3, 3, 3, 3, 3, 2, 3, 3, 3, 3, 3, 3, 3, 3, 2, 3, 3, 3, 3, 3, 3, 3, 3, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 3, 3, 3, 3, 3, 3, 3 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

a(n) = A006530(A003586(n)).

A086410(n) <= a(n) <= 3.

a(A033845(n))=A086410(A033845(n))+1; a(A006899(n))=A086410(A006899(n)). [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 25 2008]

CROSSREFS

Sequence in context: A068639 A074070 A065067 * A105528 A076225 A140887

Adjacent sequences:  A086408 A086409 A086410 * A086412 A086413 A086414

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 18 2003

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Last modified February 16 23:45 EST 2012. Contains 205978 sequences.