A151678 - OEIS

A151678

a(n) = sum_{k >= 0} binomial(wt(n+k),2*k), where wt() = A000120().

%I #2 Mar 30 2012 16:51:03

%S 1,1,2,1,2,2,4,1,2,2,4,2,4,5,7,1,2,2,4,2,4,5,7,2,4,5,7,5,8,12,11,1,2,

%T 2,4,2,4,5,7,2,4,5,7,5,8,12,11,2,4,5,7,5,8,12,11,5,8,12,12,12,17,26,

%U 16,1,2,2,4,2,4,5,7,2,4,5,7,5,8,12,11,2,4,5,7,5,8,12,11,5,8,12,12,12,17,26,16

%N a(n) = sum_{k >= 0} binomial(wt(n+k),2*k), where wt() = A000120().

%K nonn

%O 0,3

%A _N. J. A. Sloane_, Jun 01 2009