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Number of positive integers <= 2^n of form x^2 + 8 y^2.
0

%I #11 Jan 24 2022 03:57:07

%S 1,1,2,3,6,10,18,32,59,107,202,375,709,1344,2567,4905,9423,18151,

%T 35051,67879,131688,255972,498339,971558,1896661,3706983,7252576,

%U 14203258,27839240,54610355,107204740,210595574,413961363,814190153,1602250651

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

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

%Y Cf. A020671.

%K nonn

%O 0,3

%A _David W. Wilson_