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A112756 Greatest prime factor of n-th number of the form 3^i*5^j. 3
1, 3, 5, 3, 5, 5, 3, 5, 5, 3, 5, 5, 5, 3, 5, 5, 5, 5, 3, 5, 5, 5, 5, 3, 5, 5, 5, 5, 5, 3, 5, 5, 5, 5, 5, 5, 3, 5, 5, 5, 5, 5, 5, 3, 5, 5, 5, 5, 5, 5, 5, 3, 5, 5, 5, 5, 5, 5, 5, 5, 3, 5, 5, 5, 5, 5, 5, 5, 5, 3, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 5, 5, 5 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

a(n) = A006530(A003593(n));

A112755(n) <= a(n) <= 5.

CROSSREFS

Cf. A112764, A086411.

Sequence in context: A105439 A142972 A020765 * A121795 A188889 A151568

Adjacent sequences:  A112753 A112754 A112755 * A112757 A112758 A112759

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 18 2005

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Last modified February 15 05:45 EST 2012. Contains 205694 sequences.