A309134 Nonnegative integers of the form x^2+12*x*y-y^2.

0, 1, 4, 9, 12, 16, 21, 25, 27, 28, 33, 36, 37, 44, 48, 49, 63, 64, 67, 77, 81, 84, 99, 100, 107, 108, 112, 121, 123, 132, 137, 139, 141, 144, 147, 148, 151, 159, 164, 169, 176, 188, 189, 192, 196, 212, 213, 219, 225, 231, 233, 243, 249, 252, 256, 268, 269, 284

Offset: 1

Author

Hugo Pfoertner, Jul 14 2019

Keywords

• nonn

Comments

Discriminant of indefinite binary quadratic form: 148.

Links

• Will Jagy, C++ program Conway_Positive_All.cc to find all positive numbers represented by an indefinite binary quadratic form
• Peter Luschny, Binary Quadratic Forms
• N. J. A. Sloane et al., Binary Quadratic Forms and OEIS(Index to related sequences, programs, references)

Crossrefs

Primes in this sequence: A141163.