%I A054173
%S A054173 0,0,1,1,4,5,10,18,35,65,120,225,430,814,1549,2981,5739,11084,21474,
%T A054173 41663,81033,157830,307912,601482,1176314,2302911,4513106,8851907,
%U A054173 17376317,34134944,67101922,131990741,259779732,511566355,1007901666
%N A054173 Number of positive integers <= 2^n of form 4 x^2 + 9 y^2.
%H A054173 <a href="Sindx_Qua.html#quadpop">Index entries for sequences related 
               to populations of quadratic forms</a>
%Y A054173 Sequence in context: A022309 A049897 A049867 this_sequence A049898 A166577 
               A109675
%Y A054173 Adjacent sequences: A054170 A054171 A054172 this_sequence A054174 A054175 
               A054176
%K A054173 nonn
%O A054173 0,5
%A A054173 David W. Wilson (davidwwilson(AT)comcast.net)