%I A054164
%S A054164 0,0,1,2,4,8,13,24,44,79,147,275,516,976,1859,3552,6810,13102,25281,
%T A054164 48908,94819,184144,358279,698183,1362298,2661409,5204770,10189097,
%U A054164 19964562,39151220,76835090,150897513,296542636,583115721,1147276480
%N A054164 Number of positive integers <= 2^n of form 3 x^2 + 7 y^2.
%H A054164 <a href="Sindx_Qua.html#quadpop">Index entries for sequences related 
               to populations of quadratic forms</a>
%Y A054164 Sequence in context: A018066 A096573 A000077 this_sequence A102704 A043774 
               A043777
%Y A054164 Adjacent sequences: A054161 A054162 A054163 this_sequence A054165 A054166 
               A054167
%K A054164 nonn
%O A054164 0,4
%A A054164 David W. Wilson (davidwwilson(AT)comcast.net)