%I #2 Mar 30 2012 16:51:03
%S 2,3,5,4,5,6,11,5,5,6,11,7,11,14,21,6,5,6,11,7,11,14,21,8,11,14,21,15,
%T 23,33,36,7,5,6,11,7,11,14,21,8,11,14,21,15,23,33,36,9,11,14,21,15,23,
%U 33,36,16,23,33,38,34,49,73,57,8,5,6,11,7,11,14,21,8,11,14,21,15,23,33,36,9,11
%N a(n) = sum_{k >= 0} binomial(2*wt(n+k),k), where wt() = A000120().
%K nonn
%O 0,1
%A _N. J. A. Sloane_, Jun 01 2009