OFFSET
1,1
COMMENTS
Dirichlet proved that the average value of tau(n) is approximately log(n) + 2 * EulerGamma - 1 (see the reference by Tattersall).
REFERENCES
Tattersall, J. "Elementary Number Theory in Nine Chapters". Cambridge University Press, 1999.
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
MATHEMATICA
Select[Range[10^3], DivisorSigma[0, # ] == Round[Log[ # ] + 2*EulerGamma - 1] &]
CROSSREFS
KEYWORD
nonn
AUTHOR
Joseph L. Pe, Jul 19 2002
STATUS
approved