A106974 Primes of the form 2x^2+2xy+11y^2, with x and y nonnegative.

2, 11, 23, 71, 107, 179, 191, 239, 347, 359, 431, 443, 491, 599, 659, 683, 743, 827, 911, 947, 1019, 1031, 1103, 1163, 1187, 1367, 1439, 1451, 1499, 1523, 1583, 1607, 1619, 1667, 1871, 2003, 2027, 2039, 2087, 2111, 2207, 2339, 2459, 2531, 2543

Offset: 1

Author

T. D. Noe, May 09 2005

Keywords

• nonn
• easy

Comments

Discriminant=-84.

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[2, 2, 11, 10000] (* see A106856 *)