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A243703
Nonnegative numbers represented by the indefinite quadratic form -x^2+13xy+9y^2.
1
0, 9, 21, 31, 36, 39, 41, 45, 49, 51, 61, 81, 84, 91, 105, 119, 124, 141, 144, 155, 156, 159, 164, 169, 180, 189, 195, 196, 201, 204, 205, 221, 225, 244, 245, 251, 255, 279, 289, 291, 305, 324, 329, 336, 349, 351, 364, 369, 371, 379, 389, 401, 405, 411, 419
OFFSET
1,2
COMMENTS
Discriminant 205.
PROG
(C++) // Jagy's program, see link.
// Conway_Positive_All -1 13 9 500
CROSSREFS
Primes: A243704.
Sequence in context: A139538 A173460 A110701 * A133929 A325573 A086470
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jun 17 2014
STATUS
approved