%I

%S 1,1,2,2,3,3,3,3,4,4,4,5,5,6,6,6,7,7,8,8,8,8,9,9,9,9,10,10,11,11,11,

%T 12,12,12,12,13,13,13,14,14,15,15,15,15,16,16,16,16,17,17,17,18,18,19,

%U 19,19,20,20,21,21,21,21,22,22,22,23,23,24,24,24,25,25,25,25,26,26,26,26

%N Least k such that A078649(k)>=n

%F a(n) should be asymptotic to n/3.

%K nonn

%O 1,3

%A _Benoit Cloitre_, Feb 07 2009