A243706 Primes represented by the indefinite quadratic form 3x^2+13xy-3y^2.
3, 7, 13, 17, 47, 53, 67, 97, 137, 157, 167, 193, 227, 233, 257, 263, 293, 313, 317, 347, 383, 397, 457, 463, 503, 547, 557, 563, 577, 587, 593, 643, 653, 673, 683, 727, 757, 773, 823, 827, 883, 887, 937, 967, 977, 997, 1013, 1063, 1093
Offset: 1
Keywords
Links
- N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)
Crossrefs
Primes in A243705.
Programs
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PARI
fc(a,b,c,M) = { my(t1=List(),t2); forprime(p=2,prime(M), t2 = qfbsolve(Qfb(a,b,c),p); if(t2 != 0, listput(t1,p)) ); Vec(t1) }; fc(3,13,-3,600)
Comments