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A106964 Primes of the form 3x^2+2xy+7y^2, with x and y nonnegative. 1
3, 7, 23, 67, 127, 163, 227, 263, 307, 383, 463, 467, 523, 563, 587, 647, 727, 787, 907, 983, 1087, 1103, 1123, 1163, 1187, 1283, 1327, 1367, 1447, 1483, 1543, 1567, 1583, 1783, 1823, 1847, 1867, 1907, 2003, 2027, 2087, 2143, 2207, 2243, 2467 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Discriminant=-80.
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[3, 2, 7, 10000] (* see A106856 *)
CROSSREFS
Sequence in context: A148691 A148692 A201204 * A096019 A148693 A148694
KEYWORD
nonn,easy
AUTHOR
T. D. Noe, May 09 2005
STATUS
approved

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)