A106892 - OEIS

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A106892

Primes of the form 3x^2+2xy+4y^2, with x and y nonnegative.

3, 23, 37, 89, 113, 157, 179, 191, 317, 331, 379, 389, 433, 487, 509, 577, 643, 709, 751, 823, 859, 881, 971, 983, 1153, 1171, 1193, 1259, 1277, 1279, 1301, 1373, 1423, 1489, 1607, 1637, 1709, 1741, 1747, 1879, 2027, 2029, 2143, 2179, 2203, 2269

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

OFFSET

1,1

COMMENTS

Discriminant=-44.

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, 4, 10000] (* see A106856 *)

CROSSREFS

Sequence in context: A138465 A006598 A245623 * A370601 A116893 A106066

Adjacent sequences: A106889 A106890 A106891 * A106893 A106894 A106895

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 09 2005

STATUS

approved