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 A033209 Primes of form x^2+11*y^2. 4
 11, 47, 53, 103, 163, 199, 257, 269, 311, 397, 401, 419, 421, 499, 587, 599, 617, 683, 757, 773, 863, 883, 907, 911, 929, 991, 1021, 1087, 1109, 1123, 1181, 1237, 1291, 1307, 1367, 1433, 1439, 1543, 1567, 1571, 1609, 1621, 1697, 1699, 1753, 1873, 1907, 2003 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Primes p such that the polynomial x^3-x^2-x-1 mod p has 3 zeros. Compare A106279. - T. D. Noe, May 02 2005 REFERENCES D. Cox, "Primes of Form x^2 + n y^2", Wiley, 1989. LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 MATHEMATICA QuadPrimes[1, 0, 11, 10000] (* see A106856 *) CROSSREFS Sequence in context: A177370 A126672 A179786 * A107216 A158809 A044113 Adjacent sequences:  A033206 A033207 A033208 * A033210 A033211 A033212 KEYWORD nonn,easy AUTHOR EXTENSIONS Extended by T. D. Noe, Apr 17 2012 STATUS approved

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