Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #14 Jun 15 2018 08:11:12
%S 0,1,2,5,10,19,35,66,124,235,446,848,1616,3088,5915,11356,21844,42094,
%T 81249,157062,304039,589307,1143583,2221620,4320301,8409506,16383693,
%U 31945779,62338040,121733596,237884882,465163198,910144583
%N a(n) = floor(log(n)*2^n/n).
%H Harry J. Smith, <a href="/A065613/b065613.txt">Table of n, a(n) for n = 1..200</a>
%t Table[Floor[(Log[n]2^n)/n],{n,40}] (* _Harvey P. Dale_, Feb 07 2015 *)
%o (PARI) { default(realprecision, 100); for (n=1, 200, write("b065613.txt", n, " ", floor( log(n)*2^n/n )) ) } \\ _Harry J. Smith_, Oct 24 2009
%Y Cf. A065614, A065615.
%K nonn
%O 1,3
%A _N. J. A. Sloane_, Dec 03 2001
%E Offset changed from 0 to 1 by _Harry J. Smith_, Oct 24 2009