OFFSET
1,4
COMMENTS
LINKS
Jaroslav Krizek, Table of n, a(n) for n = 1..1000
EXAMPLE
For n = 6: phi(6)/tau(6) = 2/4 = 1/2; a(6) = 1.
MAPLE
with(numtheory): A279287:=n->numer(phi(n)/sigma(n)): seq(A279287(n), n=1..150); # Wesley Ivan Hurt, Dec 11 2016
MATHEMATICA
Table[Numerator[EulerPhi[n]/DivisorSigma[0, n]], {n, 78}] (* Michael De Vlieger, Dec 09 2016 *)
PROG
(Magma) [Numerator(EulerPhi(n)/NumberOfDivisors(n)): n in[1..1000]]
(PARI) a(n) = numerator(eulerphi(n)/numdiv(n)) \\ Felix Fröhlich, Dec 09 2016
CROSSREFS
KEYWORD
nonn,frac
AUTHOR
Jaroslav Krizek, Dec 09 2016
STATUS
approved