A309133 Nonnegative integers of the form 4*x^2+6*x*y-7*y^2.

0, 3, 4, 7, 9, 11, 12, 16, 21, 27, 28, 33, 36, 41, 44, 47, 48, 49, 53, 63, 64, 71, 73, 75, 77, 81, 83, 84, 99, 100, 101, 108, 111, 112, 121, 123, 127, 132, 141, 144, 147, 148, 149, 157, 159, 164, 173, 175, 176, 181, 188, 189, 192, 196, 197, 201, 211, 212, 213

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: A141161.