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Table[\sum\limits_{k=0}^{2^n}floor( (\dfrac{n}{1+PrimePi(k)})^(1/n)), {n,1,10}]
Table[\sum\limits_{k=0}^{2^n}floor( (\dfrac{n}{1+PrimePi(k)})^(1/n)), {n,1,10}]
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