A033254 - OEIS

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A033254

Primes of form x^2+85*y^2.

89, 101, 149, 229, 281, 349, 389, 409, 421, 461, 509, 569, 661, 701, 761, 769, 829, 1021, 1069, 1109, 1181, 1249, 1301, 1361, 1381, 1409, 1429, 1481, 1549, 1709, 1721, 1789, 1801, 1861, 1889, 2089, 2129

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

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)

FORMULA

The primes are congruent to {1, 9, 21, 49, 69, 81, 89, 101, 121, 149, 161, 169, 189, 229, 281, 321} (mod 340). - T. D. Noe, Apr 29 2008

MATHEMATICA

QuadPrimes2[1, 0, 85, 10000] (* see A106856 *)