OFFSET
1,2
COMMENTS
If n is an odd prime then a(n) = A001844((n-1)/2). - Robert Israel, Jan 26 2018
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MAPLE
seq(denom(numtheory:-sigma[3](n)/numtheory:-sigma[2](n)), n=1..100); # Robert Israel, Jan 26 2018
MATHEMATICA
Denominator[Table[DivisorSigma[3, n]/DivisorSigma[2, n], {n, 60}]] (* Harvey P. Dale, Nov 03 2011 *)
PROG
(PARI) a(n) = my(f = factor(n)); denominator(sigma(f, 3)/sigma(f, 2)); \\ Amiram Eldar, Dec 20 2024
CROSSREFS
KEYWORD
easy,nonn,frac
AUTHOR
Labos Elemer, Feb 12 2004
STATUS
approved