A106959 Primes of the form 2x^2+xy+10y^2, with x and y nonnegative.

2, 13, 31, 181, 257, 263, 283, 383, 457, 467, 499, 547, 653, 719, 751, 809, 821, 919, 971, 1091, 1151, 1187, 1217, 1223, 1237, 1423, 1471, 1709, 1721, 1747, 1879, 2137, 2141, 2221, 2267, 2521, 2593, 2657, 2659, 2753, 2909, 2939, 3011, 3083, 3257

Offset

1,1

Comments

Discriminant=-79.

Links

Vincenzo Librandi and Ray Chandler, Table of n, a(n) for n = 1..10000 [First 1000 terms from Vincenzo Librandi]

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

Mathematica

QuadPrimes2[2, 1, 10, 10000] (* see A106856 *)

Crossrefs

Sequence in context: A086924 A108660 A107132 * A285096 A177455 A185950

Adjacent sequences: A106956 A106957 A106958 * A106960 A106961 A106962

Keyword

nonn,easy

Author

T. D. Noe, May 09 2005

Status

approved