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a(n) divides A003557 but is not equal to it.
Table of n, a(n) for n=1..104.
n=1800: the squarefree kernel is 2.3.5=30 and 900=30^2 divides n, a(1800)=2, the quotient.
A001694, A007497, A051904, A003557, A052485.
Sequence in context: A220122 A101446 A219093 * A014649 A070084 A193518
Adjacent sequences: A062757 A062758 A062759 * A062761 A062762 A062763
Labos Elemer, Jul 16 2001