A243170 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A243170

Nonnegative integers of the form 4x^2+xy-4y^2.

0, 1, 4, 9, 10, 14, 16, 25, 26, 29, 35, 36, 40, 49, 56, 61, 64, 65, 74, 79, 81, 90, 91, 94, 100, 101, 104, 116, 121, 126, 131, 134, 139, 140, 144, 146, 160, 166, 169, 179, 181, 185, 191, 194, 196, 199, 211, 224, 225, 234, 235, 244, 250, 251, 256, 259, 260, 261, 269, 274, 289, 290, 296, 311, 315, 316, 324, 326, 329, 334, 335, 350, 360, 361, 364, 365

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,3

COMMENTS

Discriminant 65.

LINKS

Table of n, a(n) for n=1..76.

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

CROSSREFS

Primes in this sequence = A141111.

Sequence in context: A140292 A208980 A010426 * A356711 A054294 A198097

Adjacent sequences: A243167 A243168 A243169 * A243171 A243172 A243173

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jun 01 2014

STATUS

approved