A244030 Composite numbers n such that the quadratic form x^2+n*y^2 does not represent a prime strictly between n and 2n.

8, 24, 26, 35, 56, 68, 119, 120, 125, 134, 185, 194, 206, 290, 314, 326, 341, 356, 371, 404, 464, 489, 524, 545, 626, 635, 671, 698, 699, 749, 755, 815, 914, 978, 1011, 1141, 1161, 1190, 1205, 1232, 1316, 1529, 1595, 1634, 1760, 1784, 2021, 2546, 3419, 3464, 3485, 3561, 3674, 3746, 3806, 4094, 4616, 4904, 6041, 7061, 7556, 8876, 9974, 12326, 17531, 17786, 43181

Offset: 1

Author

N. J. A. Sloane, Jun 22 2014

Keywords

• nonn

Links

• William C. Jagy and Irving Kaplansky, Positive definite binary quadratic forms that represent the same primes [Cached copy]

Crossrefs

Cf. A244029, A244031.