1,3

Discriminant of indefinite binary quadratic form: 148.

Table of n, a(n) for n=1..58.

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)

(C++) See Jagy link.

Primes in this sequence: A141163.

Sequence in context: A010449 A210607 A312857 * A312858 A312859 A045673

Adjacent sequences: A309131 A309132 A309133 * A309135 A309136 A309137

nonn

Hugo Pfoertner, Jul 14 2019

approved