%I #5 Jul 10 2015 19:39:14
%S 1,2,3,3,4,4,5,5,6,6,6,7,7,8,8,8,9,9,9,10,10,10,11,11,11,12,12,12,12,
%T 13,13,13,14,14,14,14,15,15,15,16,16,16,16,17,17,17,17,18,18,18,18,19,
%U 19,19,19,20,20,20,20,21,21,21,21,22,22,22,22,23,23
%N A discrete analog of Li(n): floor ( Sum_{k=2..n} 1/log_e (k) ).
%K nonn
%O 2,2
%A _N. J. A. Sloane_