A348708 Number of squarefree integers with an odd number of prime factors <= 10^n.
0, 4, 30, 303, 3053, 30421, 303857, 3039127, 30395383, 303963673, 3039652332, 30396399068, 303963519954, 3039635209356, 30396355530761, 303963552535238, 3039635510867921, 30396355103617024, 303963550950390745, 3039635508820145344, 30396355092470750098, 303963550928711270447
Offset: 0
Keywords
Examples
a(1) = 4 because there are 4 squarefree integers with an odd number of prime factors <= 10: 2, 3, 5, 7.
Programs
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Mathematica
Table[Length@Select[Range[10^n],MoebiusMu@#==-1&],{n,0,6}]
Comments