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A106921 Primes of the form x^2+xy+15y^2, with x and y nonnegative. 1
17, 71, 139, 163, 197, 223, 317, 373, 383, 389, 439, 461, 479, 521, 547, 631, 641, 677, 727, 733, 743, 787, 827, 1019, 1063, 1103, 1181, 1229, 1237, 1327, 1361, 1373, 1511, 1559, 1619, 1657, 1693, 1747, 1823, 1907, 1913, 1951, 2113, 2129, 2131 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Discriminant=-59.
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, 1, 15, 10000] (* see A106856 *)
CROSSREFS
Sequence in context: A039407 A043230 A044010 * A105414 A157910 A141959
KEYWORD
nonn,easy
AUTHOR
T. D. Noe, May 09 2005
STATUS
approved

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Last modified July 19 22:34 EDT 2024. Contains 374441 sequences. (Running on oeis4.)