OFFSET
1,2
COMMENTS
a(n) = tau(n)^sigma_p(n), where sigma_p(n) = A001065(n) = the sum of proper divisors of n.
LINKS
Jaroslav Krizek, Table of n, a(n) for n = 1..50
FORMULA
EXAMPLE
a(4) = tau(4)^sigma(4) / tau(4)^4 = 3^7 /3^4 = 27.
MATHEMATICA
Table[DivisorSigma[0, n]^[DivisorSigma[1, n] - n], {n, 1000}]
PROG
(PARI) s=[]; for(n=1, 30, s=concat(s, sigma(n, 0)^sigma(n)/sigma(n, 0)^n)); s \\ Colin Barker, Jan 22 2014
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Jan 21 2014
STATUS
approved