login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A243170 Nonnegative integers of the form 4x^2+xy-4y^2. 1
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 * A054294 A198097 A157908

Adjacent sequences:  A243167 A243168 A243169 * A243171 A243172 A243173

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jun 01 2014

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 17 19:32 EDT 2021. Contains 345085 sequences. (Running on oeis4.)