A309139 Primes of the form 3*x^2 + 2*x*y + 8*y^2.

3, 13, 41, 71, 127, 139, 179, 257, 269, 311, 331, 409, 439, 443, 461, 541, 587, 673, 739, 761, 823, 887, 967, 1051, 1061, 1087, 1129, 1153, 1223, 1237, 1277, 1373, 1381, 1409, 1427, 1439, 1567, 1619, 1733, 1741, 1783, 1933, 1973, 2017, 2063, 2083, 2203, 2239, 2417

Offset: 1

Author

Hugo Pfoertner, Jul 14 2019

Keywords

• nonn

Comments

Primes in A028960.

Discriminant of positive definite binary quadratic form: -92.

Links

• Peter Luschny, Binary Quadratic Forms
• N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)

Crossrefs

Cf. A028960. Subsequence of A106866.