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
G. C. Greubel, Table of n, a(n) for n = 2..5000
MATHEMATICA
Table[Denominator[Mean[Flatten[Table[#[[1]], {#[[2]]}]&/@ FactorInteger[ n]]]], {n, 110}] (* Harvey P. Dale, Jun 20 2013 *)
CROSSREFS
KEYWORD
frac,nonn
AUTHOR
Franklin T. Adams-Watters, Oct 02 2006
STATUS
approved