login
A139503
Primes of the form x^2 + 23x*y + y^2 for x and y nonnegative.
1
79, 109, 151, 211, 331, 379, 421, 499, 541, 571, 631, 709, 739, 751, 919, 991, 1009, 1051, 1129, 1171, 1201, 1381, 1429, 1471, 1549, 1579, 1621, 1759, 1789, 1801, 1831, 1999, 2011, 2179, 2221, 2251, 2269, 2311, 2389, 2521, 2671, 2689, 2731, 2851, 3019
OFFSET
1,1
LINKS
N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)
MATHEMATICA
a = {}; w = 23; k = 1; Do[Do[If[PrimeQ[n^2 + w*n*m + k*m^2], AppendTo[a, n^2 + w*n*m + k*m^2]], {n, m, 400}], {m, 1, 400}]; Union[a] (*Artur Jasinski*)
KEYWORD
nonn
AUTHOR
Artur Jasinski, Apr 24 2008
STATUS
approved