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A165689 Numbers n such that pi(n)=(1/10)*n. 0


%S 64540,64580,64610,64620,64650,64690,64700,64710,64720

%N Numbers n such that pi(n)=(1/10)*n.

%C A subsequence of A057809. For each positive integer m, set of the numbers n

%C such that pi(n)=(1/10^m)*n is a finite set. I guess that all these sets are

%C nonempty. What is the smallest number n such that pi(n)=(1/100)*n?

%t Select[10 Range[10000], PrimePi[ # ] == 1/10 # &]

%Y Cf. A057809,

%K fini,full,nonn

%O 1,1

%A _Farideh Firoozbakht_, Oct 06 2009

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Last modified April 18 21:17 EDT 2015. Contains 256774 sequences.