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A106977 Primes of the form 4x^2-3xy+6y^2, with x and y nonnegative. 1
7, 109, 139, 181, 241, 277, 439, 457, 463, 547, 613, 631, 643, 661, 673, 691, 811, 919, 937, 1051, 1069, 1093, 1231, 1321, 1327, 1543, 1579, 1657, 1741, 1747, 2053, 2083, 2113, 2269, 2311, 2437, 2503, 2539, 2677, 2731, 2887, 2953, 2971, 3049 (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

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

CROSSREFS

Sequence in context: A033516 A130629 A137648 * A142480 A202515 A096498

Adjacent sequences:  A106974 A106975 A106976 * A106978 A106979 A106980

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 09 2005

STATUS

approved

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Last modified May 29 15:44 EDT 2020. Contains 334704 sequences. (Running on oeis4.)