%I #10 Jul 20 2015 08:38:05
%S 2,2,4,4,4,8,12,12,16,24,28,36,48,64,72,102,124,160,212,256,332,444
%N Let C_n(m) = number of Christoffel words of length m and order n; a(n) = max_m C_n(m).
%H A. de Luca and A. de Luca, <a href="http://arxiv.org/abs/1410.4085">Sturmian words and the Stern sequence</a>, arXiv:1410.4085 [cs.DM], 2014.
%K nonn,more
%O 1,1
%A _N. J. A. Sloane_, Jul 19 2015
