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A138195 Floor(8*n/(5*log(n))). 2

%I

%S 4,4,4,4,5,5,6,6,6,7,7,8,8,8,9,9,9,10,10,11,11,11,12,12,12,13,13,13,

%T 14,14,14,15,15,15,16,16,16,17,17,17,17,18,18,18,19,19,19,20,20,20,21,

%U 21,21,21,22,22,22,23,23,23,24,24,24,24,25,25,25,26,26,26,26,27,27,27,28

%N Floor(8*n/(5*log(n))).

%C A138194(n) <= A000720(n) <= a(n), (Tschebyscheff, 1850).

%Y Cf. A050500, A050499, A050501.

%K nonn

%O 2,1

%A _Reinhard Zumkeller_, Mar 04 2008

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Last modified September 22 00:42 EDT 2020. Contains 337276 sequences. (Running on oeis4.)