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A108602 Number of distinct prime factors of highly composite numbers (definition 1, A002182). 14
0, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 7, 7, 8, 8, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 8, 9, 8, 9, 8, 9, 9, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
COMMENTS
n appears A086334(n) times. - Lekraj Beedassy, Sep 02 2006
LINKS
T. D. Noe, Table of n, a(n) for n = 1..10000 (using data from Flammenkamp)
A. Flammenkamp, Highly composite numbers
FORMULA
a(n) = A001221(A002182(n)).
EXAMPLE
A002182(8) = 48 = 2^4*3, which has 2 distinct prime factors, so a(8)=2.
CROSSREFS
Sequence in context: A111850 A343265 A059396 * A305025 A363743 A085290
KEYWORD
nonn
AUTHOR
Jud McCranie, Jun 12 2005
EXTENSIONS
Edited by Ray Chandler, Nov 11 2005
STATUS
approved

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Last modified May 20 11:55 EDT 2024. Contains 372712 sequences. (Running on oeis4.)