A054187 - OEIS

%I #11 Jan 24 2022 15:34:51

%S 0,0,0,2,3,5,9,17,30,57,105,199,373,701,1345,2575,4954,9562,18509,

%T 35916,69837,136010,265251,518118,1013282,1983707,3887580,7625434,

%U 14969119,29407328,57811961,113724176,223843323,440828855,868596930

%N Number of positive integers <= 2^n of form 7 x^2 + 8 y^2.

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

%Y Cf. A020690.

%K nonn

%O 0,4

%A _David W. Wilson_