OFFSET
1,4
COMMENTS
a(n) depends only on the prime signature of n (cf. A025487). So a(24) = a(375) since 24=2^3*3 and 375=3*5^3 both have prime signature (3,1).
LINKS
R. J. Mathar, Table of n, a(n) for n = 1..1295
FORMULA
Dirichlet g.f.: Product{n=2..infinity} (1/(1-1/n^s)^A050338(n)).
EXAMPLE
4 = (((4))) = (((2*2))) = (((2)*(2))) = (((2))*((2))) = (((2)))*(((2))).
CROSSREFS
KEYWORD
nonn
AUTHOR
Christian G. Bower, Oct 15 1999
STATUS
approved