OFFSET
1,1
COMMENTS
Discriminant=-420. See A139643 for more information.
The primes are congruent to {1, 109, 121, 169, 289, 361} (mod 420).
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)
MATHEMATICA
QuadPrimes2[1, 0, 105, 10000] (* see A106856 *)
PROG
(Magma) [ p: p in PrimesUpTo(7000) | p mod 420 in {1, 109, 121, 169, 289, 361}]; // Vincenzo Librandi, Jul 28 2012
(Magma) k:=105; [p: p in PrimesUpTo(7000) | NormEquation(k, p) eq true]; // Bruno Berselli, Jun 01 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
T. D. Noe, Apr 29 2008
STATUS
approved