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A123529 Denominator of average of prime factors of n. 16
1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 3, 1, 2, 1, 1, 1, 3, 1, 1, 1, 2, 1, 4, 1, 2, 1, 3, 1, 3, 1, 1, 1, 2, 1, 2, 1, 2, 1, 4, 1, 1, 1, 1, 3, 2, 1, 5, 1, 1, 1, 3, 1, 4, 1, 4, 1, 2, 1, 1, 1, 2, 3, 1, 1, 3, 1, 1, 1, 3, 1, 5, 1, 2, 3, 3, 1, 1, 1, 5, 1, 2, 1, 2, 1, 2, 1, 4, 1, 4, 1, 1, 1, 2, 1, 6, 1, 3, 3, 2, 1, 3, 1, 4, 1, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET
2,5
COMMENTS
Prime factors counted with multiplicity. - Harvey P. Dale, Jun 20 2013
Positions of 1's are A078175. a(n) is a divisor of Omega(n) = A001222(n). The average of prime indices (as opposed to prime factors) of n is A326567(n)/A326568(n). - Gus Wiseman, Jul 18 2019
LINKS
MATHEMATICA
Table[Denominator[Mean[Flatten[Table[#[[1]], {#[[2]]}]&/@ FactorInteger[ n]]]], {n, 110}] (* Harvey P. Dale, Jun 20 2013 *)
CROSSREFS
See A123528 for more formulas and references.
Sequence in context: A185147 A206921 A327402 * A140747 A330757 A322373
KEYWORD
frac,nonn
AUTHOR
STATUS
approved

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Last modified March 28 05:02 EDT 2024. Contains 371235 sequences. (Running on oeis4.)