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%I #11 Jan 24 2022 03:56:31
%S 0,0,1,2,4,8,13,24,44,79,147,275,516,976,1859,3552,6810,13102,25281,
%T 48908,94819,184144,358279,698183,1362298,2661409,5204770,10189097,
%U 19964562,39151220,76835090,150897513,296542636,583115721,1147276480
%N Number of positive integers <= 2^n of form 3 x^2 + 7 y^2.
%H <a href="/index/Qua#quadpop">Index entries for sequences related to populations of quadratic forms</a>
%Y Cf. A020679.
%K nonn
%O 0,4
%A _David W. Wilson_
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