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 A141776 Primes of the form 3*x^2+4*x*y-6*y^2 (as well as of the form 3*x^2+10*x*y+y^2). 2
 3, 11, 59, 67, 89, 97, 113, 137, 163, 179, 251, 257, 313, 331, 353, 379, 401, 419, 433, 443, 449, 467, 499, 521, 577, 587, 617, 619, 641, 643, 683, 691, 859, 881, 883, 907, 929, 947, 971, 977, 1049, 1123, 1153, 1171, 1193, 1259, 1291, 1307, 1321, 1409, 1433 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Discriminant = 88. Class = 2. Binary quadratic forms a*x^2+b*x*y+c*y^2 have discriminant d=b^2-4ac and gcd(a,b,c)=1. REFERENCES Borevich and Shafaewich, Number Theory. D. B. Zagier, Zetafunktionen und quadratische Koerper. LINKS EXAMPLE a(1)=3 because we can write 3=3*1^2+4*1*0-6*0^2 (or 3=3*1^2+10*1*0+0^2). CROSSREFS Cf. A141777 (d=88). Sequence in context: A126100 A009444 A168325 * A071698 A089188 A086827 Adjacent sequences:  A141773 A141774 A141775 * A141777 A141778 A141779 KEYWORD nonn AUTHOR Laura Caballero Fernandez, Lourdes Calvo Moguer, Maria Josefa Cano Marquez, Oscar Jesus Falcon Ganfornina and Sergio Garrido Morales (sergarmor(AT)yahoo.es), Jul 04 2008 EXTENSIONS More terms from Colin Barker, Apr 05 2015 STATUS approved

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