A243182 Numbers of the form 2x^2+2xy+5y^2.

0, 2, 5, 8, 9, 17, 18, 20, 26, 29, 32, 36, 41, 45, 50, 53, 65, 68, 72, 74, 80, 81, 89, 90, 98, 101, 104, 113, 116, 117, 122, 125, 128, 137, 144, 146, 149, 153, 162, 164, 170, 173, 180, 185, 194, 197, 200, 212, 218, 221, 225, 233, 234, 242, 245, 257, 260, 261, 269, 272, 281, 288, 290, 293, 296, 305, 306, 314, 317, 320, 324, 333, 338, 353, 356, 360, 362, 365, 369

Offset

1,2

Comments

Discriminant -36.

All terms mod 12 are in {0, 2, 5, 6, 8, 9}. - R. J. Mathar, Jul 07 2023

Links

Table of n, a(n) for n=1..79.

N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)

Crossrefs

Primes: A243183.

Sequence in context: A026448 A258353 A173286 * A088620 A068702 A083724

Adjacent sequences: A243179 A243180 A243181 * A243183 A243184 A243185

Keyword

nonn

Author

N. J. A. Sloane, Jun 02 2014

Status

approved