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A112755 Smallest prime factor of n-th number of the form 3^i*5^j. 3
1, 3, 5, 3, 3, 5, 3, 3, 3, 3, 5, 3, 3, 3, 3, 3, 5, 3, 3, 3, 3, 3, 3, 3, 5, 3, 3, 3, 3, 3, 3, 3, 3, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 5, 3, 3 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

a(n) = A020639(A003593(n));

a(n) <= A112756(n) <= 5.

CROSSREFS

Cf. A112763, A086410.

Sequence in context: A161670 A135514 A092553 * A126659 A102294 A021287

Adjacent sequences:  A112752 A112753 A112754 * A112756 A112757 A112758

KEYWORD

nonn

AUTHOR

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

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.