A106882 Primes of the form 2x^2+2xy+5y^2, with x and y nonnegative.

2, 5, 17, 29, 53, 89, 101, 137, 149, 173, 197, 257, 269, 281, 293, 317, 353, 401, 449, 461, 509, 521, 593, 617, 641, 653, 677, 701, 797, 809, 857, 881, 929, 941, 953, 977, 1049, 1061, 1109, 1181, 1193, 1217, 1229, 1277, 1289, 1373, 1409, 1433, 1481

Offset: 1

Author

T. D. Noe, May 09 2005

Keywords

• nonn
• easy

Comments

Discriminant=-36.

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)

Crossrefs

A subsequence of A243183.

Programs

Mathematica

QuadPrimes2[2, 2, 5, 10000] (* see A106856 *)