OFFSET
1,2
COMMENTS
The power of n with exponent given by the difference between its sum of divisors and its count of divisors.
LINKS
Jaroslav Krizek, Table of n, a(n) for n = 1..50
FORMULA
EXAMPLE
a(4) = 4^(sigma(4)-tau(4)) = 4^(7-3) = 4^4 = 256.
MATHEMATICA
Table[n^[ DivisorSigma[1, n] - DivisorSigma[0, n]], {n, 50}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Sep 27 2009
EXTENSIONS
Slightly edited by R. J. Mathar, Sep 29 2009
STATUS
approved