A243704 Primes represented by the indefinite quadratic form -x^2+13xy+9y^2.
31, 41, 61, 251, 349, 379, 389, 401, 419, 431, 449, 461, 491, 619, 631, 739, 769, 811, 821, 829, 1009, 1061, 1171, 1181, 1229, 1231, 1279, 1289, 1321, 1361, 1451, 1471, 1499, 1601, 1699, 1721, 1759, 1861, 2081, 2131, 2239, 2339, 2341, 2411, 2551, 2579, 2591, 2789
Offset: 1
Keywords
Links
- N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)
Crossrefs
Primes in A243703.
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(-1,13,9,600)
Comments