1,2
27=3^3 and 72=2^3*3^2 is powerful.
Cf. A001694, A115693.
Adjacent sequences: A115691 A115692 A115693 this_sequence A115695 A115696 A115697
Sequence in context: A029786 A029792 A112993 this_sequence A028935 A030089 A007235
nonn,base
Giovanni Resta (g.resta(AT)iit.cnr.it), Jan 31 2006
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