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Number of positive integers <= 2^n of form 5 x^2 + 7 y^2.
0

%I #11 Jan 24 2022 03:56:10

%S 0,0,0,2,3,6,11,20,37,69,128,241,458,869,1666,3202,6183,11966,23227,

%T 45149,87983,171703,335520,656541,1286071,2521752,4949262,9721510,

%U 19109550,37589316,73985978,145708602,287115841,566037092,1116437422

%N Number of positive integers <= 2^n of form 5 x^2 + 7 y^2.

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

%Y Cf. A020686.

%K nonn

%O 0,4

%A _David W. Wilson_