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A309138 Nonnegative integers of the form x^2 + 23*y^2. 0
0, 1, 4, 9, 16, 23, 24, 25, 27, 32, 36, 39, 48, 49, 59, 64, 72, 81, 87, 92, 93, 96, 100, 101, 104, 108, 117, 121, 123, 128, 141, 144, 156, 167, 169, 173, 192, 196, 207, 208, 211, 213, 216, 219, 223, 225, 232, 236, 243, 248, 256, 261, 271, 279, 288, 289, 307, 312 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Discriminant of positive definite binary quadratic form: -92.
LINKS
Peter Luschny, Binary Quadratic Forms
N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)
CROSSREFS
Primes in this sequence: A033217.
Cf. A028958.
Sequence in context: A152399 A022822 A001639 * A162207 A092614 A313351
KEYWORD
nonn
AUTHOR
Hugo Pfoertner, Jul 14 2019
STATUS
approved

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Last modified March 29 07:27 EDT 2024. Contains 371265 sequences. (Running on oeis4.)