A106976 - OEIS

A106976

Primes of the form 4x^2+3xy+6y^2, with x and y any integer.

7, 13, 67, 109, 139, 181, 199, 223, 241, 277, 313, 439, 457, 463, 499, 523, 547, 613, 631, 643, 661, 673, 691, 811, 919, 937, 991, 1009, 1021, 1051, 1069, 1093, 1153, 1213, 1231, 1321, 1327, 1399, 1483, 1543, 1579, 1657, 1669, 1741, 1747, 1789

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

OFFSET

1,1

COMMENTS

Discriminant=-87.

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

Union[QuadPrimes2[4, 3, 6, 10000], QuadPrimes2[4, -3, 6, 10000]] (* see A106856 *)

CROSSREFS

Sequence in context: A325029 A159198 A373543 * A219908 A098478 A174878

Adjacent sequences: A106973 A106974 A106975 * A106977 A106978 A106979

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 09 2005

STATUS

approved