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%I #11 Apr 03 2024 10:06:00
%S 0,9,21,31,36,39,41,45,49,51,61,81,84,91,105,119,124,141,144,155,156,
%T 159,164,169,180,189,195,196,201,204,205,221,225,244,245,251,255,279,
%U 289,291,305,324,329,336,349,351,364,369,371,379,389,401,405,411,419
%N Nonnegative numbers represented by the indefinite quadratic form -x^2+13xy+9y^2.
%C Discriminant 205.
%H Will Jagy, <a href="/A243655/a243655.txt">C++ program Conway_Positive_All.cc to find all positive numbers represented by an indefinite binary quadratic form</a>
%H Will Jagy, <a href="/A243655/a243655_2.txt">Sample output from Conway_Positive_All.cc</a>
%H N. J. A. Sloane et al., <a href="https://oeis.org/wiki/Binary_Quadratic_Forms_and_OEIS">Binary Quadratic Forms and OEIS</a> (Index to related sequences, programs, references)
%o (C++) // Jagy's program, see link.
%o // Conway_Positive_All -1 13 9 500
%Y Primes: A243704.
%K nonn
%O 1,2
%A _N. J. A. Sloane_, Jun 17 2014
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