A106913 Primes of the form x^2+xy+14y^2, with x and y nonnegative.

59, 71, 199, 229, 251, 269, 311, 379, 389, 509, 631, 661, 691, 751, 839, 929, 1049, 1061, 1171, 1181, 1279, 1321, 1409, 1439, 1499, 1571, 1609, 1699, 1721, 1741, 1901, 1951, 2029, 2069, 2269, 2341, 2399, 2531, 2621, 2671, 2729, 2819, 2971

Offset: 1

Author

T. D. Noe, May 09 2005

Keywords

• nonn
• easy

Comments

Discriminant=-55.

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)

Programs

Mathematica

QuadPrimes2[1, 1, 14, 10000] (* see A106856 *)