A054180 - OEIS

%I #7 Mar 30 2012 18:35:40

%S 0,0,0,1,3,5,9,16,29,52,93,169,315,591,1119,2124,4052,7763,14922,

%T 28781,55629,107775,209241,406916,792579,1545812,3018687,5901609,

%U 11549484,22623452,44352970,87021370,170860941,335698520,659971004,1298228239

%N Number of positive integers <= 2^n of form 5 x^2 + 10 y^2.

%H <a href="/index/Qua#quadpop">Index entries for sequences related to populations of quadratic forms</a>

%K nonn

%O 0,5

%A _David W. Wilson_