A033229 Primes of form x^2+42*y^2.

43, 67, 163, 193, 211, 331, 337, 379, 457, 499, 547, 571, 673, 739, 883, 907, 1009, 1033, 1051, 1129, 1171, 1201, 1297, 1579, 1723, 1747, 1801, 1873, 2011, 2017, 2083, 2137, 2179, 2251, 2347, 2377, 2473

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• easy

References

• David A. Cox, "Primes of the Form x^2 + n y^2", Wiley, 1989.

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

Cf. A139643.

Programs

Mathematica

QuadPrimes2[1, 0, 42, 10000] (* see A106856 *)

Formula

Primes congruent to {1, 25, 43, 67, 121, 163} (mod 168). - T. D. Noe, Apr 29 2008