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A072047 Number of prime factors of the square-free numbers: omega(A005117(n)). +0
3
0, 1, 1, 1, 2, 1, 2, 1, 1, 2, 2, 1, 1, 2, 2, 1, 2, 1, 3, 1, 2, 2, 2, 1, 2, 2, 1, 3, 1, 2, 1, 2, 1, 2, 2, 2, 1, 1, 2, 2, 3, 1, 2, 3, 1, 1, 2, 2, 3, 1, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 1, 1, 3, 1, 3, 2, 1, 1, 3, 2, 1, 3, 2, 2, 2, 2, 2, 1, 2, 3, 1, 2, 2, 1, 3, 1, 2, 2, 2, 2, 2, 1, 1, 3, 2, 1 (list; graph; listen)
OFFSET

1,5

CROSSREFS

a(n) = A001221(A005117(n)) = A001222(A005117(n)).

Cf. A072048.

Sequence in context: A115660 A128581 A026517 this_sequence A106802 A049236 A094840

Adjacent sequences: A072044 A072045 A072046 this_sequence A072048 A072049 A072050

KEYWORD

nonn,nice

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jun 09 2002

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Last modified December 4 12:48 EST 2009. Contains 170310 sequences.


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