%I A054169
%S A054169 0,0,1,2,4,7,14,25,45,84,154,290,549,1043,1990,3820,7352,14198,27473,
%T A054169 53327,103697,201926,393781,769123,1503776,2943595,5767727,11310982,
%U A054169 22200249,43604981,85706123,168562900,331717805,653148282,1286697640
%N A054169 Number of positive integers <= 2^n of form 4 x^2 + 5 y^2.
%H A054169 <a href="Sindx_Qua.html#quadpop">Index entries for sequences related 
               to populations of quadratic forms</a>
%Y A054169 Sequence in context: A048248 A056180 A000076 this_sequence A065491 A072810 
               A167606
%Y A054169 Adjacent sequences: A054166 A054167 A054168 this_sequence A054170 A054171 
               A054172
%K A054169 nonn
%O A054169 0,4
%A A054169 David W. Wilson (davidwwilson(AT)comcast.net)