1,1

E.g. n=12=(2^2)*(3^1)=([ 2nd prime ]^pi[ 2 ])*([ first prime ]^pi[ 3 ]).

Cf. A008478, A048767, A048769.

Sequence in context: A050855 A031070 A109297 this_sequence A070226 A129829 A053900

Adjacent sequences: A048765 A048766 A048767 this_sequence A048769 A048770 A048771

easy,nonn

Naohiro Nomoto (6284968128(AT)geocities.co.jp)