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A112763 Smallest prime factor of n-th 5-smooth number. +0
4
1, 2, 3, 2, 5, 2, 2, 3, 2, 2, 3, 2, 2, 2, 2, 5, 3, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 3, 2, 3, 2, 2, 2, 2, 2, 5, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 5, 2, 2, 3, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3 (list; graph; listen)
OFFSET

1,2

COMMENT

a(n) = A020639(A051037(n));

a(n) <= A112764(n) <= 5.

CROSSREFS

Cf. A112755, A086410.

Sequence in context: A053139 A124386 A098668 this_sequence A093476 A066727 A076606

Adjacent sequences: A112760 A112761 A112762 this_sequence A112764 A112765 A112766

KEYWORD

nonn

AUTHOR

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

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.


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