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A086289 Total Number of prime factors of 7-smooth numbers. 4
0, 1, 1, 2, 1, 2, 1, 3, 2, 2, 3, 2, 2, 4, 3, 3, 2, 4, 2, 3, 3, 3, 5, 2, 4, 4, 3, 3, 5, 2, 3, 4, 4, 4, 3, 6, 3, 5, 3, 5, 4, 4, 4, 6, 3, 4, 3, 5, 5, 5, 3, 4, 7, 4, 4, 6, 3, 4, 6, 5, 5, 3, 5, 4, 7, 4, 5, 4, 6, 6, 4, 6, 5, 3, 4, 5, 8, 5, 5, 7, 4, 5, 4, 7, 6, 6, 3, 4, 6, 4, 5, 8, 5, 6, 5, 5, 7, 4, 7, 5 (list; graph; refs; listen; history; internal format)
OFFSET

1,4

COMMENTS

a(n) = A001222(A002473(n));

A086290(n) <= A086291(n) <= a(n).

CROSSREFS

Cf. A086288.

Sequence in context: A066921 A076649 A157235 * A077807 A191784 A173442

Adjacent sequences:  A086286 A086287 A086288 * A086290 A086291 A086292

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 15 2003

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Last modified February 17 04:46 EST 2012. Contains 205985 sequences.